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Post by glennz01 on Nov 8, 2015 3:01:45 GMT -5
Well I finally slabbed some of the copper minerals I found last month. They turned out decent. I don't have any pictures of the area I got these from because the mountian was unstable and we would occasionally have rocks hit us so I was worried about breaking my camera. I think next time I go back i'm going to have an atv helmet since the area has heavy pealing of rocks. Totally worth it though... some of the best crysocholla i found thus far for AK came from this area.
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Post by glennz01 on Nov 8, 2015 13:41:02 GMT -5
I'm not sure if the dark blue / purple or bornite or covellite... I'll probably know after I cab it and see if it changes colors.
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Post by Deleted on Nov 12, 2015 23:02:36 GMT -5
Which copper minerals are those?
I don't see any i recognize and would love to learn something new.
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Post by glennz01 on Nov 13, 2015 2:13:45 GMT -5
Which copper minerals are those? I don't see any i recognize and would love to learn something new. I'm not sure where my other photo went but i'll post it on this post... The photo you see above contains a lot of covellite which is the dark purple / blue color. It has some small amounts of crysocholla. The photo below has a lot more crysocholla and chalcopyrite, smaller amounts of covellite. The red color is probably cuprite. Covellite is actually considered to be rare. There is another location in Alaska far beyond where I got this (a days drive) that has solid chunks of covellite. I'm hoping to go to that location some day.
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Post by Deleted on Nov 13, 2015 11:05:05 GMT -5
Put,some hydrochloric acid on that and tell us what happens. Specially on the red and green areas.
Please also scratch test the red area.
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Post by glennz01 on Nov 13, 2015 11:33:12 GMT -5
Put,some hydrochloric acid on that and tell us what happens. Specially on the red and green areas. Please also scratch test the red area. the white part is made up of both calcite and quartz so it would fizz due to the calcite bits mixed in. The green in the 1st slab is epidote
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Post by Deleted on Nov 13, 2015 11:52:09 GMT -5
Not what im after. Put hydrochloric on the colored areas and report results here.
Did you scratch text the red area?
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Post by drocknut on Nov 13, 2015 12:11:18 GMT -5
The red could also be hematite but more than likely it is cuprite. Covelite is really beautiful cabbed.
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Post by Deleted on Nov 13, 2015 12:13:58 GMT -5
The red could also be hematite but more than likely it is cuprite. Covelite is really beautiful cabbed. To go with the pyrite and the red jasper, hematite makes good sense.
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Post by glennz01 on Nov 13, 2015 12:39:35 GMT -5
I'll see if I have some left later today after I go to some interviews. I might have used all my acid when cleaning my prehnite. I know that the red is not jasper just because of how the mountian is.. but normally red is jasper around here.Its also chalcopyrite... not pyrite.. (when treated it turns into "peacock ore")
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Post by Deleted on Nov 13, 2015 15:54:53 GMT -5
Scratch test the red
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Post by glennz01 on Nov 13, 2015 17:59:39 GMT -5
So the red bits are harder than my knife and quartz.. but because it is mixed with white material i'm not sure how enfused it is with that material. some f the bassult can be scratched with my knife but some parts can't be scratched.
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Post by Deleted on Nov 13, 2015 21:14:51 GMT -5
Harder than steel, no cuprite.
Its jasper.
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Post by glennz01 on Nov 13, 2015 21:41:16 GMT -5
Harder than steel, no cuprite. Its jasper. maybe but if it is hidden in prehnite than it might not be scratching the red material. I have some Michigan copper almost like it where I also thought the red was jasper but was told otherwise as a knife wouldn't scratch it as well.
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Post by washingtonrocks on Nov 14, 2015 17:44:12 GMT -5
Looks quite a bit like some Nickeline with Rammelsbergite specimens I have. I'll see if I can dig them up and post photos.
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