julieooly
Cave Dweller
Member since October 2018
Posts: 714
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Post by julieooly on Jun 2, 2019 8:52:27 GMT -5
Pu Sodalite was a great guess but when I compared them it wasn’t correct. It has a little bit of green blue like chrysocolla in the edge.
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Post by hummingbirdstones on Jun 2, 2019 9:41:06 GMT -5
Looks like azurite with malachite to me.
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Post by rockjunquie on Jun 2, 2019 9:50:55 GMT -5
Looks like it could be shattuckite, too.
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julieooly
Cave Dweller
Member since October 2018
Posts: 714
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Post by julieooly on Jun 2, 2019 10:22:24 GMT -5
Looks like it could be shattuckite, too. Its polished on one side and way shinier than the shattuckite I have but I'll compare them, thanks.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Jun 2, 2019 12:40:57 GMT -5
From your photos, it does look more like a copper-complex than sodalite (though sodalite can be found along with greenish minerals, such as the sodalite+aegerine from BC). Your closeup shows at least 3 shades of pure blue, so it could be a combo of azurite, shattuckite and something else (the darkest blue). Even the aqua-colored areas seem to be a mix (some could be malachite, some chrysocolla, others could be ajoite or staining). Color alone isn't a sure-fire way of id'ing. Would be easier to narrow down were the source known.
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julieooly
Cave Dweller
Member since October 2018
Posts: 714
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Post by julieooly on Jun 2, 2019 13:29:00 GMT -5
From your photos, it does look more like a copper-complex than sodalite (though sodalite can be found along with greenish minerals, such as the sodalite+aegerine from BC). Your closeup shows at least 3 shades of pure blue, so it could be a combo of azurite, shattuckite and something else (the darkest blue). Even the aqua-colored areas seem to be a mix (some could be malachite, some chrysocolla, others could be ajoite or staining). Color alone isn't a sure-fire way of id'ing. Would be easier to narrow down were the source known. Thanks, "estate sale find" won't help much! It came from a reputable slab seller ddrockshop.com all the slabs in these most recent threads came from him but he couldn't positively identify/sell so I got them in a mixed lot. I think Copper Complex is a great description, we will see if anyone else chimes in. Its a beautiful blue!
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Post by vegasjames on Jun 3, 2019 4:30:18 GMT -5
Looks like it is very likely azurite. Especially with the other copper minerals present. The green looks light for most malachite. Could be dioptase as well.
As for the blue you can try acid on a small scrap piece and see if it fizzes. Azurite being a carbonate will fizz with an acid test.
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julieooly
Cave Dweller
Member since October 2018
Posts: 714
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Post by julieooly on Jun 3, 2019 16:13:41 GMT -5
Looks like it is very likely azurite. Especially with the other copper minerals present. The green looks light for most malachite. Could be dioptase as well. As for the blue you can try acid on a small scrap piece and see if it fizzes. Azurite being a carbonate will fizz with an acid test. Oh fun with geochemistry! What kind of acid? My daughter is working in the Stable Isotope lab at UGA, I'm sure she can find what I need.
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Post by vegasjames on Jun 3, 2019 18:24:00 GMT -5
Looks like it is very likely azurite. Especially with the other copper minerals present. The green looks light for most malachite. Could be dioptase as well. As for the blue you can try acid on a small scrap piece and see if it fizzes. Azurite being a carbonate will fizz with an acid test. Oh fun with geochemistry! What kind of acid? My daughter is working in the Stable Isotope lab at UGA, I'm sure she can find what I need. I normally use diluted hydrochloric acid but you can also use vinegar.
Does the lab your daughter works for do oxygen isotope analysis?
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julieooly
Cave Dweller
Member since October 2018
Posts: 714
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Post by julieooly on Jun 3, 2019 19:20:39 GMT -5
Oh fun with geochemistry! What kind of acid? My daughter is working in the Stable Isotope lab at UGA, I'm sure she can find what I need. I normally use diluted hydrochloric acid but you can also use vinegar.
Does the lab your daughter works for do oxygen isotope analysis?
Yes she does/they do.
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fuss
spending too much on rocks
Member since October 2018
Posts: 250
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Post by fuss on Jun 7, 2019 8:38:24 GMT -5
If it is Sodalite it may fluoresce an orange color, if you dont already have a long wave UV light they are relatively cheap $10-15 at a hardware store, wal mart etc.. can be useful as well for other rocks you have. Looks like the others are Azurite/chrysocolla.
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