Tag Archives: Rock Hunts

Petoskey Stones-Hunting in December?

Do we go Christmas Shopping or rock hunting? What a stupid question!!

Seldom does Northern Michigan weather allow rock hunting in December. Under normal circumstances we would be under at least a foot of snow by mid-December.
Unusual temperatures above 50 as well as misty conditions came together to allow for one amazing Petoskey Stone Hunt.

Where's the Petoskey Stone?

I no longer hunt Petoskey Stones on the beach for several reasons. The main reason right now is that the water level is way low and the rocks are covered in moss and slime. You cannot even identify a Petoskey Stone under this mess. The second reason; as experience has taught me that the more perfect, mud-free Petoskey Stones, can only be found in the on shore gravels. I hunt a few private gravel pits for the best stones.

Just a bunch of plain sandy rocks?

Today we found the stones damp from the mist, and washed out of the gravel by the melted snow cover. Bonnie was happy today with her finds. She sometimes is discouraged as she has trouble finding Petoskey Stones if the weather dries up. Today was moist, but not drowning us. Treasures were found by both of us.

Fist sized Petoskey Stones seemed more common than usual. We found some nice little bead stones and several of the most coveted Pink Petoskey Stones. I picked up an assortment of glacially tumbled rocks to consider for jewelry later.

After they're sorted and washed, they look a LOT better.

I sorted the stones by “Grade A”, “Pinks”, and what I call “Weirdos”. These include all the other fossils, jaspers, agates, and strange stuff that the glaciers brought for me to find.

The "Nice Ones" pile.

Today I found Petrified Wood, Pudding Stones, Agates, and assorted “Heinz Stones” (These are stones that are all mixed up and contain a lot of stuff). I usually identify some of the materials within these Heinz Stones, but some of these stones are really stunners.

The "Weirdos" pile.

My Favorite, the rare "Pink Petoskey Stone" pile. Three to five of these is a good day indeed!

We have actually hunted Petoskey Stones on New Years Day several years ago, but rock hunting, especially a great hunt, seldom happens in December.

Greenstones in the Rain (and other fun U.P. things)

The colors in the Keweenaw were about 30%, but we found spots. This tree was near Phoenix.

Our fall weekend in the Keweenaw was very productive.

The view from the top of Brockway Mountain indicates it will be a couple weeks before peak colors.

By going up Thursday, most tourist traffic can be avoided, and an extra day for rock hunting opens up. We found some nice greenstone at the Mandan.

Finding a nice Greenstone in all this rock is a challenge.

The best time to locate Greenstones is in the rain. The silky chatoyance just pops from the stones, both the loose nodules and those nodules still embedded in the matrix. We looked pretty wet and scruffy after a day in the rain, but it was worth it.

We had the Cliff Pile to ourselves on this drizzly day.

My favorite fall colors, maple Leaves and Greenstones.

Friday is also ‘pasty day” at the Mohawk Superettte. The locals purchase their pasties (pronounced pas-tee) in quantities, and we are happy to when we are in the area. We find them to be some of the finest pasties around. For those that do not know what a pasty is, they are a portable Cornish pie made from coarsely ground beef, with small cubes of potatoes, and rutabagas. You can find recipies on line. This was a hearty lunch for the miners, sort of an early version of fast food!

Any day is a great day to Stop in the Jam Pot and purchase a few delicious Muffins and rum-soaked, raisin and nut filled, brownies from the monks. Yum! (Closed Sundays, of course)

Makes me hungry just looking at the sign in Mohawk.

This rock ship at Kearsarge always makes us smile. Bonnie mans the ship at the Veterans Memorial.

While just aimlessly searching I saw a 3″ suspect just laying on the ground. This was just a suspect greenstone and may or may not develop into a winner. We also went to the Cliff mine, my favorite Prehnite location, and picked up some nice material to cut.

Whenever I go to the Upper Peninsula, I enjoy at least one day wire wrapping at Copper World in Calumet, and I really had a great time as usual. Talking to the customers, and answering rock and jewelry questions are a couple of my favorite things.

Sunday was another cool day with some scattered showers, we went out with some new rockhound friends. Bonnie found some nice little greenstones, and I found a very nice 2″ stone that has to be cut from a rock.

From left to right beginning at the top: Mesnard Datolite, Rose Quartz and Quartz with Copper, Franklin Datolite, Yellow Keweenaw Point Datolite, Patricianite with Silver and Copper.

While up north, I also located a source for some rare and unusual things like Patricianite with silver, and pink crystallized Datolite. Let’s see what kind of jewelry I can make.

Close-up of the Rose Quartz Cabochon.

A couple other things we did were donating a polished Pink Petoskey to the Seaman Mineral Museum (Blog coming), and I walked into Copper World Sunday afternoon and met a couple from Dayton, Ohio that had just purchased an exceedingly rare large Greenstone with a centrally embedded copper crystal, as well as a Petoskey Stone Pendant. It’s always nice to meet with owners of my jewelry. It means a lot to me to talk to them and answer any questions, and I think that the jewelry means a lot more to them when they can say they have met the artist. I could have stopped in any time, but Karma (I learned about this from Earl) brought me in at that particular time.

Patricianite with silver and copper inclusions.

Now I have some exciting new U.P. gemstones to cut, polish, and wrap up. It will be a great rest of the month.

The above stones I cut this morning. Enjoy!

Thomsonite Salvaged from the Road

It’s always a dilemma to know what rock to go hunting for in the Keweenaw. The choices include scouring the rock piles Chlorastrolite (Greenstone), Datolite, Prehnite, Thomsonite, or walking the beaches for Lake Superior Agates. All of these Michigan stones are good for jewelry, so it is a pleasure to add any of them to my supply piles. Just as a lark, Bonnie & I decided to wander north in search of something, and ended up on a two-track where we had previously found Prehnite and Thomsonite.

Too bad I chipped this one.

As is my usual habit, I drive slowly down the track, and peer out the window. As I was looking out the window, I saw a small white rock nodule lying in the middle of the road. If you have ever hunted Thomsonite or Verigated Prehnite (U.P. Thomsonite), you would know to look for white bleached out nuggets of rock in the banks and the trail. I took my pick and without completely getting out of the car, hit the end of it, exposing a wonderful eyed Thomsonite. I should never have his this stone, but fortunately I just chipped it. I don’t believe I’ve ever found a nicer Thomsonite. These are so very rare when they are beautiful colors with eyes.

All day long we looked for similar pieces, but never even came close. Some days are like that, you find the best thing first, and then all the rest fails to deliver that same excitement. I can’t wait to get home and put that stone under my grinder. It will surely be the best drive-by road hunt I’ve ever had. And it was shady too. A “Cool” rock hunt in more ways than one.

The finest piece of Pink-eyed Thomsonite I ever found in the Keweenaw,

There will be more on this stone when it is finished and in a pendant.

Cliff Mine-Prehnite Hunting

The hounds are released on the Cliff Mine Pile.

The pile was bulldozed and the Copper Country Mineral Retreat hunt at the Cliff Mine began at 9am. A good crowd of eager hunters attacked the pile. A nice trench was excavated and some entered it while others, like me hunted the surface. The Cliff, even though hunted for over a hundred years by rockhounds, still produces some fine copper specimens as well as other copper associated minerals. Native American Indians hammered this copper in prehistoric times, and chisel chips left from their mining are found at the Cliff today.

A nice trench was excavated and our buddy Keith from Baltimore found his way into it.

A great view of the Cliff mine showing the trench that fellow rockhounds were searching.

Since I already have so much native copper, Bonnie and I spent the day hunting for gem Prehnite for our jewelry. The Prehnite at the Cliff formed in small veins maybe a few inches thick and is apple green and speckled with copper. We were quite successful and found good pieces with some help from Pam Hecht who is a good buddy and led the hunt.

Prehnite comes in various forms and colors in the Copper Country. One of my favorites is referred to as “U.P. Thomsonite” and is verigated, often with eyes. Prehnite comes in assorted pastel colors, the most common being pink and green.

A seam of Copper bearing Prehnite from the Cliff Mine.

Here is some of that Prehnite on my workbench. Notice the copper?

The Cliff mine was the first successful copper mine in the Copper Country of the state of Michigan. The mine is at the now-abandoned town of Clifton in Keweenaw County. Mining began in 1845, and the Cliff was the most productive copper mine in the United States from 1845 through 1854. Large-scale mining stopped in 1878. The Cliff was a fissure mine where the seams of copper were vertical.

Fissure mines are always interesting to search. I spent the day looking for gem quality Prehnite, and Bonnie and I found many nice pieces. These veins of Prehnite are commonly no more then an inch or so wide with a split down the middle as the Prehnite formed in from the outside of the vein and met in the middle. Much of this Prehnite is loaded with specks of Copper and is a pleasing apple green color.

Although amygdaloid and conglomerate deposits of the Keweenaw tended to be lower-grade than the fissure deposits, they were much larger, and could be mined much more efficiently, with the ore blasted out, hoisted to the surface, and sent to stamp mills located at a different site. Amygdaloid and conglomerate mining turned out to be much more productive and profitable than fissure mining, and the majority of highly successful mines were on amygdaloid or conglomerate lodes. The first mine to successfully mine a strataform ore body was the Quincy Mine in 1856. The most productive deposit, the Calumet conglomerate, was opened by the Calumet and Hecla mining company in 1865. (Mine information from Wikipedia)

I’ll be excited to cut this Prehnite and make some attractive pendants.

Copper Agates and Brolling

I got an opportunity to use my new rock-hunting tool, the Broll (I think it’s an abbreviation for a bucket roller). The Broll has recently come on to the market and is a wonderful, work saving device. I saw it advertised in Rock and Gem magazine, and my wife got it for me as a gift. It has large wheels and a ring that holds a five gallon bucket. I tried it a few times at home and found the only issue I had with it was it only had a grip handle.

Brolling on the rock pile.

Being a tinkerer I added a wagon type handle, making the Broll more towable. I mounted the handle vertically. This is my natural position for towing it. I had the opportunity to use it on the rock pile and on the beaches of Lake Superior. The bucket swings in its ring making it swing back and forth as I pull it across the very uneven terrain of the mine dumps! What a verstile tool!

A Broll on a stroll.

It easily holds my hammers and small tools as well as a load of rocks. Get one; the Broll is really great. No–I do not hold stock in the company!

How can you have so many rocks and no agates?

I found one very nice Copper Agate that really set off my pinpoint detector. It is in its ugly stage in the rock so I’ll show you later when I cut it out.

The beach produced a couple small agates, some Unakite, Quartz Crystals, and assorted “pretty” rocks for Bonnie’s gardens.

Today we are going to our first organized hunt at the Medora Mine. Looking for Greenstones!!

On the Workbench at Copper World

Bonnie's agate and Datolite. I wonder what color it is?

This past weekend we made it to the Copper Country for one last trip. The colors were not in bloom yet, but we had great weather for a couple of hunts. We found some great Greenstones in matrix at the Central Mine and Bonnie and I both found a Datolite. Bonnie sat down to dig a hole and had worked on it for 20 minutes, searching for the elusive Datolite. She sat down and found one under her knee right out in the open. We have not cut her Datolite yet, but this mine has white, blush green, and some light brown Datolite.

I'm working at Copper World-I Love this place!

I wire wrapped at Copper World in Calumet all day Saturday. I have great fun talking to patrons as I explain the wire wrapping process. I had a great day all the way around. While I was wire wrapping Bonnie went to the beach and found a nice Lake Superior Agate right in a spot that hundreds of others had probably walked over at a public park. It pays to know what you are looking for!

The workbench produced several pendants including two wonderful Michigan Greenstones, a Lake Superior Agate, and a Prehnite.

My workbench at Copper World. Also notice the orange Laker "paint" agate on the bench.

The Prehnite is a cabochon of the Prehnite seam I found at the Cliff Mine and is shown in the blog I posted on August 12th. As I suspected, this apple green Prehnite was loaded with copper. I cut several nice cabs from this rock. I wrapped it in Argentium and double gold filled wire. I think the round shape and the copper inclusions made this piece a standout. What do you think? It will make a wonderful piece for someone.

The finished pendant was just amazing.

My Best Datolite Ever

The faithful husband encouraging Bonnie to "did faster".

The faithful husband encouraging Bonnie to "dig faster".

The pitter patter of light raindrops was my alarm clock. Bonnie & I were up and off before dawn’s light. Only a thermos of coffee and a portable monk’s muffin went with us, as we hurried to our destination. The goal was to get there before “The Badger” got there. .(Why? I don’t know—a point of honor I guess.) We had seen him digging a hole the other day, and knew he was attacking the rock pile with a sense of purpose. We saw evidence of his success and wanted to be successful too.

Don's BIG hole.

Everybody was digging BIG holes

Chrystal's odd find while metal detecting

Krystal's odd find while metal detecting. Would this be a "float hammer" just because she was looking for "float copper"?

At 6:00 am the traffic is pretty light on US 41 in the Keweenaw, but low and behold a car appeared and turned into our very own destination rock pile. I knew who it was! Yes, the Badger, a vigorous and determined datolite digger had arrived moments before us. The bad news was that the rain disappeared, and had not been sufficient to clean off the rock recently moved around there, so there was no datolites washed out. At least the dawn had come on enough that we could see.

We watched the experienced work of the Badger (this is not his real nickname, I just called John this because of his digging skill) and joked around with him. He is a recently Tech grad in geology engineering and is goofing off this summer gathering datolites and other rock treasures. John Dezelski dug and looked. He ended up the day with around a dozen. Bonnie & I dug and between us finally got 3. You have to develop an eye, because otherwise they are camouflaged.

"Don"atolite

I have been hunting minerals in the Keweenaw for years now, but I always focused on greenstone and “cutting material”, a vague term used to cover pretty rock found in this area–Patricianite, Prehnite, and others. I have dug for datolites before, but I don’t recall finding many! Luckily sometimes when you’re digging you find other stuff to please you.

Greenstones seem to be getting harder to find as the years go by, especially real nice big ones. All my old glory holes have been hauled away for road fill. We used to get Greenstones and Datolite at many locations and now those piles are gone. It’s not like the good old days. If you want a greenstone or datolite at a reasonable price, act now. Less supply means higher prices.

Aliens and Salamanders

Copper Harbor (left) with sheltered harbor and Lake Superior on far left. Lake Fannie Hooe on the right. We are camped on the west side of the lake.

Today was a wonderful 75 degrees with a nice breeze. It rained during the night so we thought maybe some Greenstones would be washed out at the Central Mine. We headed out with our rock buddies Chris and Krystal, but had limited luck. There was not enough rain to wash the stones out.

It's a long way down US41 to Miami from here.

I found a rock with a drill core hole in it and forgot to take it when we left. I stashed it so I’ll get it tomorrow. I thought it would make a great planter for Bonnie. We all got a few things, but nothing to brag about. We left the Central and headed out to the logging road where Chris found his float copper the other day.

Chris again was the star, with a nice Lake Superior Agate he found where the bulldozer tracks were in the logging area. He also found a couple small pieces of Float Copper and Crystal found a small piece of float also. I hiked back into the bush and found an exposed Prehnite outcrop where I picked up a couple pieces to cut later.

These guys were digging so fast they were just a blur.

After we had lunch Chris, Bonnie, and I hiked back to the Prehnite area to dig. Krystal rested in the car as she got little sleep due to a bear roaming around their campsite during the night. We all dug, but the holes produced little except the blue spotted salamander Bonnie unearthed which was interesting to examine. It emitted some sticky substance from glands in its’ tail onto Chris. We released it so it could crawl back into a hole.
Just after that wildlife encounter the strangest alien looking bug landed on Chris. It stood still long enough for we to get a great shot of it. If anyone can ID either this Salamander or the bug, please let me know.

The Salamander. When we sprayed water on him he really was excited.

We think the "alien" is a moth. Does anyone know about this chartreuse bug?

We split up and Bonnie and I checked some outcrops on Brockway Mountain Drive for rare agates, but found none.

I think after some burgers on the grill we will go downtown Copper Harbor and be tourists tonight.

The Hottest Item in the Keweenaw

Most rockhounds flock to Michigan’s Keweenaw Peninsula to find copper, but there are many other rocks and minerals that are much more rare. Any rocks and minerals that were not native silver or native copper were thought of as “Trash” and ended up on the mine rubble piles. Today we are aware of these rare treasures and dig through these old piles to find them. Unfortunately many of the spoils piles have been hauled away for fill or crushed and put under roads. Just imagine the treasures that could be found under the pavements in the Keweenaw!

I found this one inch beauty within minutes of sitting down to dig. I just had to pluck it out with my fingers.

The current hottest gemstones in the U.P. are copper-included agates. Copper has replaced some of the banding in these agates. They are generally pink and often include green. These agates are found only in a few of the mine spoil piles here in the Keweenaw, and I do not know of any other place in the world where you can get them. They generally sell at premium prices (if you can find them). Some of these agates do not include copper, but are rare none-the-less just because they are associated with the copper mines.

Chris "slams" a rock containing agates.

The business end of Chris' slammer.

There are two ways you might find these rare beauties. One is finding a “floater”, or an agate nodule that has broken free of any matrix. On a huge pile of rock, you could wish for a better strategy. The second way to find these agates is to find a rock with nodules and break the rock open to expose the usually small agates. The agates can be easily fractured, so care and a lot of finesse are required to extract them. Yes, they do show up on a sensitive metal detector.

My friend Chris has a custom built “slammer” that has a chisel on the end and virtually “slams” the rock apart. However, most of us break the rock with a heavy hammer and a strong arm. One rock I found and Chris broke open contained several copper agates, but it took some time and effort to get them out. A couple agates were sacrificed in the extraction, and Chris somehow bisected one agate perfectly in half.

Those that know (me) know that if I cannot make a piece of jewelry from a rock, I probably don’t need it. I am not a specimen collector, but I sometimes find specimens, and usually keep them for barter. I found a few “traders” already and look forward to a few more as the week goes on. I think that another Copper included agate hunt may happen tomorrow. I really had fun today.

Two perfect agate halves.

They used to have convicts break rock as punishment, and we were out there doing it for fun. But we did get to leave at our choice, just about lunchtime! Smashing with the crack hammer is serious work, and Bonnie’s arm is still sore. I think IF I can keep her hammering for a few more days, perhaps her arm muscles will strengthen (good luck with that, Don).

By the way, Chris found the largest agate today, but Bonnie was a close second.

Prehnite Adventure

Monday, August 8, 2011

When you’re rock hunting you don’t always know how good the pieces are that you have found. But I spotted a promising prehnite piece today while “driving by”, that I think might be a highlight. Here’s what’s been happening.

The famous (or infamous) lift bridge separating Houghton and Hancock.

We arrived and got settled at the Houghton Campground last Thursday. The campground that the City of Houghton owns has 22 campsites for non-tent camping located right on the channel. This is a very scenic area and it is wonderfully tranquil with the occasional boat or jet ski traveling by. The channel bisects the Keweenaw Peninsula and is a shortcut from the east side of the peninsula to the west side.

Ships can pass thru the channel and when they do the lift bridge is hoisted, causing what the locals refer to as a “traffic jam”. We have been here when the lift bridge got stuck open and it really causes havoc. There is no other way to the north and the hospital is on the Hancock side, so if there is an emergency on the Houghton side (South) there is no way to get across except by boat.

U.P. Thomsonite is really ugly, but surprises await inside the ugly shell.

Today we headed out seeking U.P Thomsonite (which is pink and green Prehnite). This makes wonderful jewelry and often shows chatoyant “eyes“. When you find the stones, they are an ugly brown or bleached white and you cannot know what is inside until you cut the rind off. Picking up the right white/brown stones is the tricky part! Lots of calcite and granite show up as little white stones, but they are not of interest and I had to keep throwing them out of Bonnie’s bucket!

I'm looking for the eroded out Thomsonite.

We were with our friends Chris and Crystal. Prehnite fills voids in basaltic material, that over the years rots away and the Prehnite nodules drop out. You can dig for them in the rotted basalt, or sometimes find an eroded bank where you can simply pick them up. We filled a small bucket in short order from mostly eroded stones. We said goodbye to Chris and Crystal and decided we were done hunting for the day.

But, before we went back to the RV, I decided to explore an old logging road. I poked my head out the window, hoping to see a large agate. Chris got a big one today, and I was hoping to catch up. I saw a large seamed rock in the road and dug it up. A fantastic large seam of eyed Prehnite appeared in the rock. This was the find of the day and I think it will make some great jewelry.

A wonderful Prehnite seam.

While hunting today we found good patches of wild raspberries and Thimbleberries. No bears were about so we ate our fill. YUM!

We have not decided what is on tomorrow’s agenda yet, but we will keep blogging on our adventures here in the Keweenaw. The weather here has been ideal in the mid-70’s, but our best hunting is in the rain, so we are hoping for some soon. It has been very dry here all summer, but there was a nice shower the other night. That’s all for now.