I can't help but disagree, politely. Galena is usually found in cube shapes, but this specimen has no cube shapes, it looks like. Also, it's too gray-black-ish to be Galena, which is way more silver. I still think it's Sphalerite. :)
Re: Rocks and Minerals Question Marathon
Posted: November 1st, 2011, 4:16 pm
by quizbowl
Katherine wrote:
XXGeneration wrote:
Galena, lead.
I can't help but disagree, politely. Galena is usually found in cube shapes, but this specimen has no cube shapes, it looks like. Also, it's too gray-black-ish to be Galena, which is way more silver. I still think it's Sphalerite. :)
I'm pretty sure you're correct.
Re: Rocks and Minerals Question Marathon
Posted: November 1st, 2011, 4:35 pm
by XXGeneration
haha I was sort of just throwing it out there. Thanks for your opinion though I really appreciate it
Re: Rocks and Minerals Question Marathon
Posted: November 2nd, 2011, 1:36 pm
by iYOA
Katherine is correct
Re: Rocks and Minerals Question Marathon
Posted: November 2nd, 2011, 2:02 pm
by Katherine
1. What type of rock is this mineral usually found in?
a) Metamorphic
b) Igneous
c) Sedimentary
2. Provide information on the following properties:
a) Group
b) Crystal System
c) Fracture
d) Hardness
e) Tenacity
3. Discuss the pros and cons of wearing this mineral (there won't necessarily be both pros AND cons) as jewelry.
If you are stuck, some of the facts from question 2 will be helpful, assuming they're correct.
Re: Rocks and Minerals Question Marathon
Posted: November 2nd, 2011, 2:22 pm
by iYOA
1.C
2.
a) Sulfate
b)Orthorombic
c)Uneven
d)3-3.5
e)brittle
3. Its not really durable for jewelry? (not sure)
I really appreciate it