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slgwv

slgwv club

Posted: 20 Nov 2014

Taken: 27 Sep 2014

1 favorite     5 comments    283 visits

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USA •
mining •
Jerome •
Arizona •
copper •
malachite •
azurite •
mineral •
carbonate •
Cu •

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Malachite (green) and azurite (blue)

Malachite (green) and azurite (blue)
Secondary copper carbonate minerals, from near-surface oxidation. On a displayed boulder at the mining museum in Jerome, AZ, a historical copper camp. I suspect there's also some chrysocolla, a secondary copper silicate that looks very similar to malachite.

Gudrun has particularly liked this photo

Comments
 Pam J
Pam J club
Examples like this cause me great envy !!!!!!

Admired in ~ I ♥ Nature
9 years ago.
 slgwv
slgwv club
Well, it was good enough to get put in a museum! ;) It's actually not uncommon to find little occurrences of malachite--azurite, tho, is rarer!
9 years ago. Edited 9 years ago.
 Pam J
Pam J club
Yes.... Mal is my favourite mineral.. and i have a few nic small pieces.. but azurite... thats harder to conm by nice pieces.

Used to go over the old spoil heaps in Cornwall at the ancient tin and lead and copper mines and find a few decent copper bits from time to time.
9 years ago. Edited 9 years ago.
 slgwv
slgwv club
Old spoil heaps are a classic collecting area!

The problem with azurite is that it's not the stable form under surface conditions, so over time it inverts to malachite. Probably lots of the malachite splashes we find exposed started as azurite.
9 years ago.
 Gudrun
Gudrun club
I have a bit of malachite from Chile but have never come across azurite!
9 years ago.

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