Monthly Archives: October 2017

Where’s my Turkish Stick Agate?

I’ve built a custom tumbling unit that will handle three 12# barrels at one time. You might ask, what has has that to do with Turkish Stick Agate? I also bought a Diamond Pacific Cab Machine in Tucson last February. So how do these things connect?

Turkish Stick Agate Rough was purchased in Tucson

I found some absolutely fantastic Turkish (Pseudomorph) Stick Agate rough rock at the Keno Show in Tucson. It was very pricey old stock, but the best material of it’s kind I’ve seen in many years. I actually spent almost an hour searching through buckets of this stuff to find the cream of the old stock crop. Finding this Stick Agate happened after I bought a used Titan from a dealer at the 28th Street Show. The deal with the Titan included spare parts, wheels and several containers of tumbling grit (which had nothing to do with the Titan) that the dealer also threw in as he was getting out of the lapidary business.

(A pseudomorph is when the original crystal form of one mineral is occupied by another, chemically or structurally different species.  I love pseudomorphs (from the Greek “false form”).  Here’s a tip:  If you see triangular shapes occupying a rock you possess, it is most likely a pseudomorph of Aragonite. When someone asks what those triangular shapes are in a rock it also makes you look smart when you say “Oh that’s a pseudomorph of Aragonite” (Better if you practice saying “Pseudomorph” so it just flows easily off your tongue.) 

Move ahead to April: I got back home and unloaded all the stuff, started cutting and polishing new rock. I ask Bonnie about the stick agate; she looks and can’t find it. A picture of this Turkish Stick Agate had appeared in the February blog, so I had proof that this was a genuine purchase, not just something I thought about buying. I searched and searched for the Stick Agate and I cannot find it anywhere. A note is posted on the refrigerator “FIND STICK AGATE”.  When notes are posted on the refrigerator they become points of stress until acted upon (I know you guys know this).

 

What wonderful lapidary material.

I named this pendant “Bugs”. Notice the fully-banded agate bug on the left.

I wear this pendant. The auburn background is unusual.

Move ahead to October: I’m tumbling some Lakers for drilling and reach the 600 grit stage. While looking for 600 grit in one of the boxes I got with the Titan, I FIND THE STICK AGATE. I do know there are Desert Gnomes in Arizona, and I think those little bastards intentionally hid that Stick Agate bag (It could never have been Bonnie or I that did this).  That’s my story……..

ALL my stress is lifted from my shoulders, I can quit my anxiety counseling, take less drugs, and REMOVE THAT DAMN MEMO FROM THE FRIDGE!!! I will always remember October 9th, 2017 as one of the highlight days of my entire life!!

Here’s the really great thing: the Stick Agate is even more beautiful than I remembered it! The saws and Titan are simultaneously humming with Stick Agate Bliss. I think I’ll make myself a new pendant in celebration of my stress relief.

Now that our Missing Rock Saga is explained, let’s talk about Turkish Stick Agate shall we? From Cubuk, Northern Ankara, Turkey. TSA (Not Airport security) comes in various forms of Pseudomorphic Aragonite in Chalcedony. The Aragonite needles are hollow tubes that formed in the shape of church steeples.  Long needles forming fans are considered the best, but these agates can also contain sagenite or fortification areas. Some TSA has tubes and not the normal Pseudomorphic Sticks.

(Aragonite and Calcite are the same composition. The only differences are that the Calcite has form differently and under different conditions. Aragonite is Orthorhombic while Calcite forms in a rhombohedral crystal. Both Calcite and Aragonite become pseuddomorphs in other minerals because of their sensitivity to acids.)

One Stick Agate I re-found had a rare reddish background color. This was the one I grabbed for my personal pendant.

Hard to believe that this too is Stick Agate from the same mine.

Another piece had beautiful dark pink banding, and looked nothing like the other Stick Agate in the piles I sorted. One cab showed white botrioildal Quartz under clear Quartz with random reddish-brown tubes throughout the gemstone.

To add to the fun I saw one large bug or a couple bugs on a stick in one cabochon. Really extraordinary stuff. We’ve been celebrating the prodigal TSA for two weeks now. May you find your missing rocks.

You can find our current selection of these pendants at our Turkish Stick Agate Pendant page!

 

 

 

 

Copper Banded Agates

Bonnie has a good hole dug, and is looking for little green nodules that may be Copper Agates.

I’m not too far away in my own hole.

After 20 years of searching the mine spoil piles in the Keweenaw, with great success, I have to admit one of my biggest blunders. I used to dig large holes in the what was left of the C&H pile, near Calumet, with my buddy Bill, looking for Datolites. At that time, if I came across a piece of copper while Datolite digging, I would keep it, but I would also find other Chlorite covered nodules, that we would call copper balls and just heave them out of the hole.

You would never believe whats may be inside these nodules.

Here’s the suprise.

Today these Chlorite covered nodules are coveted by collectors around the world. You guessed it–Many of these nodules we threw away were Copper Banded (Infused) Agates. Nobody knew at that time that these things would end up being valuable gemstones. Later I learned that my friend, the late John Perona and his brother knew about these agates for many years. Today, we also know that these special agates are found nowhere else in the world except in the Kearsarge Lode. The Powebic Lode to the South where the Quincy, Mesnard, and Franklin Mines resided, have not produced Copper Agates. You do not see Copper Agates in the rocks of the Fissure and Stratiform Deposits to the North either; so the Kearsarge Lode of the Calumet Conglomerate is very unique indeed.

Careful cutting is involved with these Copper Agates.

It’s been so many years that I forgot where my hole was, and the area has been tilled up a few times, so all those agates I threw out; who knows where they are. I actually looked for my old hole last time I was in the area. I clearly forgot where it was.

A diligent and alert Rockhound can still find Copper Agates in the Kearsarge Lode if they are willing to put in some work excavating and carefully observing the pieces of spoil rock that might contain nodules that read “hot” with a pinpoint metal detector. I enjoy sitting down and digging, especially in late August, after Black Fly season. It’s even better if it’s raining. These little balls of glory stand out a whole lot better in the rain. the usual scenario is you see a rock of rubble with nodules in it and try to extract them with tools.

How these agates formed is debatable, but the theory that makes the most sense is suggested by the Lynch brothers in their fine book Agates of Lake Superior. You’ll have to read the book to see what they say about Copper Infused Agates. I prefer that term over Copper Replacement Agates, but most of the time I just refer to them as “Copper Agates“.

My last trip involved some very successful Greenstone digging, but no Copper Agate hunting. I only had limited rock hunting time this trip, so I had to chose between Greenstones or Copper Agates.

Copper Agates are rarely really large, but some real sizable. Fully banded beauties, are sometimes found as large as a half dollar. I’m happy to find a dime sized one, but like Greenstones, a big hunker is very welcome, and always elicits a “WHOOP!”.

Here are most of those Cabochons from above turned into jewelry. All these are for sale at: www.snobappealjewelry.com

I do have miner friends in the area that usually have some Copper Agates for sale, so I always buy a few. I purchase these agates with the question; Can I make these better? If I believe that I can, I will take them home for a re-work before making jewelry. Most often Copper Agates are cut in half and sold as a pair, but often I take a pair and grind the rind off the outside where better banding may appear (or may not). Often, the odd shapes of these nodules do not allow  working the outside rind, due to all the gaps and dips in the stones, so these I either work with what the slice has produced or just sell or trade these for specimens. Most Copper Agates are bought as specimens and not so much for jewelry.

The Kearsage Lode also produces small pastel, banded agates that have little of no copper in them, but are very fine; we refer to these as “mine agates”. When found these are also Chlorite covered, just as are the Copper Banded Agates. I take everything and sort them by removing the crust in my home shop.

I work Copper Agates using my soft wheels only with loads of water to keep them cool and, for proper lubrication, an additive is added to the water when cutting. Special grinding techniques are used also. I generally treat these Copper Infused Agates with a coating to make them tarnish resistant, rather than polishing them. The coating I use is one of my trade secrets.

I sell Copper Agate pendants on line, at art shows and within a mile of where I find them, at Copper World, in Calumet. The jewelry I make from these rare agates is spectacular, simply because the Copper Agates are spectacular. It seems as though Copper Banded Agates are becoming very popular as of late. I have a good selection now, and you should remember, the closer to Christmas, the more your choice narrows.

I hope you have sensed my frustration at having tossed out hundreds of Copper Agates. I’ve got to work on my memory, because if I get it back, I’ll be INFUSED with Copper Infused Agates.