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Post by fernwood on Feb 23, 2023 5:49:07 GMT -5
Yesterday I received the Traveling Rock Box for Rockhounding For Homebound group. I started the box a little over a year ago. There were many items with no ID, mostly basic river and driveway rocks. Other, nice items with an ID. This one caught my eye. I think it is chrysocolla and something I should remember. Azurite? The black areas? Are the turquoise areas malachite and not chrysocolla? It is pretty light for size. About 2.5” long. About a 5 hardness overall. The blue is harder. There are flecks of blue crystals in some of the turquoise areas. The blue is a type of crystal. I will be adding more items to the box and trying to ID some of the contents over the next couple of weeks. Most of what I add will be items from RTH members. Stuff I either purchased or was given/won. Thank you to anyone who can provide an ID. Taken on my front porch in natural light. Dry.
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Post by vegasjames on Feb 23, 2023 9:07:18 GMT -5
The blues look like a mix of chalcanthite and azurite. Not sure on the green Can you get some clear close ups dry in natural lighting? The black can be a large number of minerals. Too bad you do not know what mine it came from. Would be a lot easier to ID.
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Post by fernwood on Feb 23, 2023 10:03:02 GMT -5
The blues look like a mix of chalcanthite and azurite. Not sure on the green Can you get some clear close ups dry in natural lighting? The black can be a large number of minerals. Too bad you do not know what mine it came from. Would be a lot easier to ID. Thank you. The above photos are dry. Natural lighting will need to wait a while, as we are in the middle of a blizzard.
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Post by vegasjames on Feb 23, 2023 11:03:34 GMT -5
The blues look like a mix of chalcanthite and azurite. Not sure on the green Can you get some clear close ups dry in natural lighting? The black can be a large number of minerals. Too bad you do not know what mine it came from. Would be a lot easier to ID. Thank you. The above photos are dry. Natural lighting will need to wait a while, as we are in the middle of a blizzard. The white though would make such a great contrasting background.
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Post by rmf on Feb 23, 2023 12:14:52 GMT -5
The green is probably mostly Malachite and the blue is Azurite. If you think there is chalcanthite (copper sulfate) then keep it from water since it would be highly soluble. This is also a good way to test. Both Malachite and Azurite are copper carbonates so to see them together is expected. Black could be cupric oxide CuO (tenorite), where as Cu2O coprous Oxide is red (cuprite).
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Post by mohs on Feb 23, 2023 16:07:02 GMT -5
those blu speckles in that field of green is a cool specimen Beth
all are good examples...
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Post by mohs on Feb 23, 2023 16:12:15 GMT -5
I here tales that yellowing is limonite ? not sure I buy that yet
still looking foe a solid silicified sample
altho I did find some that pretty quartzy and polishable
not the most blingy stuff butte I like to polish stone ..
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Post by rmf on Feb 27, 2023 5:32:35 GMT -5
The host rock appears to be a sandstone with most mineralization along the edges. Typical for many copper deposits.
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Post by mohs on Feb 27, 2023 12:15:16 GMT -5
wonder how deep that yellow goes ? good stuff! second look guess not to deep just surface chemical weathering ? fascinated with yellow rock an uncommon lapidary color...
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Post by fernwood on Feb 28, 2023 5:24:00 GMT -5
I think the dark yellow is staining.
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