Tommy
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Member since January 2013
Posts: 12,652
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Post by Tommy on Aug 4, 2018 18:36:17 GMT -5
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Deleted
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Member since January 1970
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Post by Deleted on Aug 4, 2018 18:43:45 GMT -5
You grabbed some beautiful rocks! Yes, those are super pieces of Blue Biggs, rather than Deschutes. Like the cobaltite and the weird chiastolite, too.
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Tommy
Administrator
Member since January 2013
Posts: 12,652
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Post by Tommy on Aug 4, 2018 18:50:05 GMT -5
You grabbed some beautiful rocks! Yes, those are super pieces of Blue Biggs, rather than Deschutes. Like the cobaltite and the weird chiastolite, too. Thanks! I get lost on the difference between Biggs and Deschutes but it's good to know that you are concurring with the seller. He's a knowledgeable guy who I've always been able to take at his word.
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Post by MsAli on Aug 4, 2018 20:17:15 GMT -5
Really beautiful stuff!
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saxplayer
fully equipped rock polisher
Member since March 2018
Posts: 1,327
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Post by saxplayer on Aug 4, 2018 21:25:34 GMT -5
Mmm nice haul. $3.99 right?
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Post by woodman on Aug 4, 2018 21:33:36 GMT -5
I agree with the blue biggs jasper, great stuff!
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zarguy
fully equipped rock polisher
Cedar City, Utah - rockhound heaven!
Member since December 2005
Posts: 1,791
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Post by zarguy on Aug 4, 2018 23:20:13 GMT -5
Tommy nice stuff as usual. You're a man after my heart - We don't care about it unless we can cab it! Lynn
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Post by hummingbirdstones on Aug 5, 2018 0:07:36 GMT -5
You found some killer material. Great looking Biggs!
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Post by socalagatehound on Aug 5, 2018 0:12:41 GMT -5
Very cool stuff! The cabs, which I assume are from the original purchases of Church Window Jasper, are killer!
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Tommy
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Member since January 2013
Posts: 12,652
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Post by Tommy on Aug 5, 2018 9:57:57 GMT -5
Neat piece - I bought this as a crystal specimen but I'm going to cut it and try to get one killer cab and satisfy my curiosity to see how deep the crystals run. BTW, just to elaborate about what caught my eye about this piece as I was walking by a mineral specimen booth where I wouldn't normally visit - and the reason I think I can cut a cab(s) from it without it crumbling. The composition is the same as a local material found over a wide area around Mariposa but the crystal structure is way different and that fascinates me. Our local material comes in small nuggets called cross rocks due to the cross shaped crystal structure. Eva and I went searching for cross rocks this spring but didn't have any luck and gave up early for a variety of reason including the heat and the fact that we thought Charley got a foxtail in his nose after he went into a sneezing fit that ended up lasting several days until he expelled whatever it was. Mariposa cross rocks... (borrowing this photo from Sabre52 - he posted it a few years ago)
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Post by rockjunquie on Aug 5, 2018 10:09:39 GMT -5
Really great choices! I do want to clarify something though- there is cobaltite, which looks like what you have, and there is silver in cobaltite which is cobaltite with silver. So, which is yours?
That church window jasper is amazing!!! I wouldn't have thought those cabs came from that kind of rough. Sweet!
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Post by drocknut on Aug 5, 2018 10:11:06 GMT -5
- You scored big. Blue Biggs is so cool, too bad it is out of my budget but than again so are probably all the rocks you bought...lol. Oh well.
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Tommy
Administrator
Member since January 2013
Posts: 12,652
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Post by Tommy on Aug 5, 2018 10:54:34 GMT -5
Really great choices! I do want to clarify something though- there is cobaltite, which looks like what you have, and there is silver in cobaltite which is cobaltite with silver. So, which is yours? Honestly I have no idea - it's definitely loaded with silver - almost too much to where I'm worried about if there will be enough contrast between the silver and white in the finished cabs. Can you elaborate on what the difference is?
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Post by rockjunquie on Aug 5, 2018 11:09:38 GMT -5
Tommy , a while back, I did a trade with sheldon74 for some silver in cobaltite, cobaltite and nickelite. He hounded it himself in Cobalt, Canada. I took a bunch of pictures to help me keep them straight. Cobaltite also looks and polishes silver, but the silver looks a bit difference on close inspection. One of the "silver" shiny areas will be silver and the other cobaltite. But, honestly, I forget which unless I cab another real quick. (which is extremely messy and toxic BTW) Here's a couple pictures: 1 and 4 are silver in cobaltite As far as the pattern. Personally, I like the silver in cobaltite with and without a pattern. They polish like molten silver. Beautiful. There was a seller on etsy who had a whole bunch. The ones with a lot of pattern and white showing didn't sell as well. I was keeping a keen eye out because I had some to list. The higher the silver "look"- the presumed higher silver content and desirability. Cobaltite, in itself, also very rare. eta- I have no clue why the last attachments were added and I have no idea how to get rid of them.
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Post by Rockoonz on Aug 5, 2018 11:21:42 GMT -5
Great haul. Definitely some very nice biggs and love the plume. Now I know what the silver plume stuff is, we found a slab at the Seaside rock shop that Terry had tried to tumble, Elizabeth turned it into a cab and wire wrapped it for her keeper.
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Post by Rockoonz on Aug 5, 2018 11:47:14 GMT -5
Heres what her piece turned out like. Groove wrapped and she also made the chain out of electrical wire. If anyone wants to start a thread on metal in rock please tag me, it's something I have much interest in.
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Tommy
Administrator
Member since January 2013
Posts: 12,652
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Post by Tommy on Aug 5, 2018 12:00:23 GMT -5
Thanks for the detailed post - that clarifies a lot for me. I'm still not sure which one I have but I do see what appears to be patches of brighter silver within the silver so I am thinking it's silver in cobaltite. I should stop saying "plume silver" though - chances are most of what I am calling plumes are the cobaltite. eta- I have no clue why the last attachments were added and I have no idea how to get rid of them. Yeah, that was weird... I edited the post and removed the attachments but I'm also scratching my head on how they got there.
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Deleted
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Member since January 1970
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Post by Deleted on Aug 5, 2018 12:37:55 GMT -5
BTW, just to elaborate about what caught my eye about this piece as I was walking by a mineral specimen booth where I wouldn't normally visit - and the reason I think I can cut a cab(s) from it without it crumbling. Upon first glancing at the photo, my thought was a weird cerussite-cordierite pseudomorph (something approaching Japan's Sakura Ishi/Cherry Blossom Stone). Then noticed the label, which fits with Asturias/Galician locale. Weird things can happen in metamorphic rocks, and this one really prompts one to imagine how the andalusite porphyroblasts would have sheared to produce this pattern. Looks very nice with the matrix, and I agree that it could make an unusual and interesting cab. I took a bunch of pictures to help me keep them straight. Cobaltite also looks and polishes silver, but the silver looks a bit difference on close inspection. One of the "silver" shiny areas will be silver and the other cobaltite. But, honestly, I forget which unless I cab another real quick. (which is extremely messy and toxic BTW) I forget quickly, too. I do always suspect nickeline if I detect a pinkish undertone (presumably from minor copper content), silver if it is darker, and cobaltite if it is brighter. Still, those things are subjective and a reference set of big, polished pieces (perhaps once I win the lottery, Stonerock Castle should contain a room paneled in tiles of each: The Cobaltite Drawing Room, Nickeline Library, The Native Silver Anteroom, etc.) would come in handy. My eyes tend to get distracted by the glitz, thus shiny metallic rocks can be more challenging for me to sort
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Deleted
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Member since January 1970
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Post by Deleted on Aug 5, 2018 14:51:00 GMT -5
If anyone wants to start a thread on metal in rock please tag me, it's something I have much interest in. Beautiful cab that really shows off the dendritic silver! So many metallic-looking materials, that perhaps a new topic on those would be good. FWIW, I'll paste my personal list of materials with a metallic look... Native metals (silver, gold, copper, platinum, etc.), alone or as inclusions within other rock (quartz, oligoclase, etc.) Other metallic-looking: alabandite algodonite altaite antimony arsenopyrite aschamalmite awaruite/josephinite berzelianite (not to be confused with the garnet berzeliite) bismutotantalite bornite bournonite breithauptite campbellite carrolite cassiterite chalcosite chalcopyrite chromite clausthalite cobaltite columbite (including tantalite and ferrocolumbite) coronadite covellite cubanite cuprite cylindrite digenite domeykite engargite euxenite fergusonite freibergite galena gersdorffite goethite hematite josephine's crown uknebute kamacite kobellite limonite luzonite magnetite marcasite marmatite meteoric metals mohawkite molybdenite nickeline pentlandite perovskite pulsite pyrite pyrrhotite renierite romanechite rutile samarskite skutterudite sperrylite stephanite stibnite sulvanite tapiolite tellurium tenorite ullmannite valleriite
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monkeyking
off to a rocking start
Member since January 2021
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Post by monkeyking on Jan 28, 2021 22:22:24 GMT -5
Good evening,
Sorry to resurrect an old thread, but I was hoping to find out more about the church window jasper shown above. I recently purchased some old stock Haystack Butte Jasper that once cut looks extremely similar to the examples shown above. As far as I can tell, this is the only reference on the internet to this material. Do you have any more information about this material? Does it go by any other names?
Thank you in advance,
MK
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