Identify A Rock

[Dannyalcatraz]

FWIW, here's a biiiiig emerald:

World famous jewels | Photo Gallery - Yahoo! News

 

[Jhaelen]

I'm including a few more pix, but I'm wondering if the white and green are two different things.

Actually I thought it's likely that it's different minerals. Even with the new pictures the green looks mostly amorph. I cannot tell if it has any crystalline structure. Maybe it's obsidian after all?

Googling some images showed up an example with a very similar colouring:
http://images.bidorbuy.co.za/user_images/906/394906_091111161341_obs5.jpg

 

[Dannyalcatraz]

It could be, but he said the knife wasn't really doing much to the green, translucent parts. Obsidian would flake or some such, I believe.

 

[Thunderfoot]

Limestone, oxidized copper and quartz... I'm sticking to my guns.

 

[Dannyalcatraz]

I'm sticking to my guns.

You clearly need a better gun lube. Or should stop rolling in honey before strapping up.

 

[Theo R Cwithin]

You clearly need a better gun lube. Or should stop rolling in honey before strapping up.

A Deadlands game with you would be disturbing, I fear.

 

[Dannyalcatraz]

A Deadlands game with me would be hilarious, awesome, fun...AND disturbing. I will have a character named Purity Balls, the twin .45 slingin', cigar-smokin', hard-drinkin', wild-seed daughter of the Rev. Ezekiel Leviathan Balls.

 

[Villano]

I sent an e-mail to the Earth Science professor at the local university, so we'll see what he has to say.

Also, I tried the vinegar test and nothing bubbled. And I'm not sure if I mentioned it, but the mine was an anthracite coal mine (not sure if that helps).

 

[TarionzCousin]

Also, I tried the vinegar test and nothing bubbled. And I'm not sure if I mentioned it, but the mine was an anthracite coal mine (not sure if that helps).

Oh, that helps. It's not coal.

 

[Dannyalcatraz]

I went to the InterGem show at Dallas Market Hall last weekend, and my friends at Mineral Search (Little Elm, TX) had a mineral specimen that strongly resembled what you have. Theirs was aquamarine.

Any news on yours?