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Is this turquoise?
Posted by: Eddie Currents
Date: June 20, 2017 06:37PM
Can anyone ID these rocks? Are they some type of turquoise?




Re: Is this turquoise?
Posted by: Dave J.
Date: June 20, 2017 10:04PM
Thanks for posting, EC, I done thunked the rock forum done uppen died.

Looks to me like malachite with a bit of azurite. The two very commonly go together. Neither the color nor texture look quite right for turquoise.

Funny historical note: for a few years my brother owned the Malachite Mine in Nevada. Just for rockhounding and desert ratting, no attempt to commercialize it.
It connects underground to the Mason Mine and some records don't distinguish it from the Mason Mine.
https://mrdata.usgs.gov/mrds/show-mrds.php?dep_id=10037695

Re: Is this turquoise?
Posted by: Eddie Currents
Date: June 20, 2017 10:53PM
Thanks, Mr J,
I looked at other pics of malachite online and I do believe you've nailed it. :smile:

I bought it a few years ago at a Southern California rock hound's estate sale
so it's possible it came from your brother's mine or thereabouts.

Many thanks,



Edited 3 time(s). Last edit at 06/20/2017 10:59PM by Eddie Currents.

Re: Is this turquoise?
Posted by: Dave J.
Date: June 21, 2017 12:46AM
There's malachite and azurite just about any place where copper is mined, and in the southwest USA that's all over the place.

Re: Is this turquoise?
Posted by: Eddie Currents
Date: June 21, 2017 08:56AM
Gotcha -- thanks again

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Re: Is this turquoise?
Posted by: Champ Ferguson
Date: June 21, 2017 09:36AM
fwiw, I think DaveJ is right too.

As a side note, a LOT of what is sold as turquoise these days is just a dyed something else. Howlite used to be the most popular mineral to fake turquoise with. If its too nice a 'turquoise blue, be very careful as its probably fake.



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Re: Is this turquoise?
Posted by: Johnho
Date: June 22, 2017 01:01PM
Are those samples relatively heavy? Sure looks like malachite with bornite. If they're light then yes, azurite.

Re: Is this turquoise?
Posted by: Birdbrain
Date: February 24, 2019 01:05AM
Hello, I’ve been doing this “test” for years not really sure it works or not but still practice this. Take a human hair (human only) wrap around said rock in question take a lighter and try to burn the hair if it’s tourquise the hair will not burn. It’s kinda fun . Thank you



Leavarite

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Re: Is this turquoise?
Posted by: Champ Ferguson
Date: February 24, 2019 09:59AM
Quote
Birdbrain
Hello, I’ve been doing this “test” for years not really sure it works or not but still practice this. Take a human hair (human only) wrap around said rock in question take a lighter and try to burn the hair if it’s tourquise the hair will not burn. It’s kinda fun . Thank you

I'd be very careful applying heat around turquoise- you will drive off some of the water ions in the structure leading to possibly cracking the stone.



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Re: Is this turquoise?
Posted by: Birdbrain
Date: February 24, 2019 12:29PM
Thank you I wasn’t aware of that fact. I’m usually dealing with small stuff and don’t want to catch a .finger. Thanks again



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