Rocks and Minerals Question Marathon

LoopQuantumGravity · Post by **LoopQuantumGravity** » April 26th, 2012, 4:33 pm

Quartz (citrine)
1. Magma, Saturated silica solutions
2. Semiprecious gemstone
3. 1427 C

quizbowl · Post by **quizbowl** » April 26th, 2012, 7:58 pm

LoopQuantumGravity wrote:Quartz (citrine)
1. Magma, Saturated silica solutions
2. Semiprecious gemstone
3. 1427 C

Nope!

Kazen · Post by **Kazen** » April 27th, 2012, 3:13 pm

Hello!

Is it? (Click to Show Hidden Text)

Fluorite:
1. Hydrothermal
2. Smelting and Steel Production
3. 1360 degrees celsius

quizbowl · Post by **quizbowl** » April 27th, 2012, 4:36 pm

Kazen wrote:Hello!
Is it? (Click to Show Hidden Text)
Fluorite:
1. Hydrothermal
2. Smelting and Steel Production
3. 1360 degrees celsius

Indeed it is! Also you could answer #2 with flux.

Kazen · Post by **Kazen** » April 27th, 2012, 8:01 pm

ID this mineral and its chemical formula. (:

(and thanks for the tip~)

tuftedtitmouse12 · Post by **tuftedtitmouse12** » April 27th, 2012, 8:30 pm

hmm... (Click to Show Hidden Text)

Bornite. Cu5FeS4

Kazen · Post by **Kazen** » April 27th, 2012, 8:32 pm

tuftedtitmouse12 wrote:
hmm... (Click to Show Hidden Text)
Bornite. Cu5FeS4

Nope! But the colors certainly look similar. ;D

tornado guy · Post by **tornado guy** » April 27th, 2012, 8:37 pm

Is this right?? (Click to Show Hidden Text)

Chalcopyrite; CuFeS2?

Kazen · Post by **Kazen** » April 27th, 2012, 8:43 pm

tornado guy wrote:
Is this right?? (Click to Show Hidden Text)
Chalcopyrite; CuFeS2?

Nope! Similar colors as well. XD

quizbowl · Post by **quizbowl** » April 27th, 2012, 8:54 pm

This has got to be

a piece of (Click to Show Hidden Text)

Specular hematite, Fe2O3

Scioly.org