[img]https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcS48r4oJV9_fL8ZbD1-_mtL1xavLxEilz4ZHiWjYx6s4nPvF4If[/img]
Just ID (variety, not group)
Oh no...
It looks like it's probably an emerald, although I've seen some tremolite that occurs in that shade of green.
Incorrect.
Hint: Look at the texture and crystal form.
Re: Rocks and Minerals B/C
Posted: September 9th, 2017, 4:35 pm
by ScottMaurer19
dxu46 wrote:
whythelongface wrote:
dxu46 wrote:Wow....
[img]https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcS48r4oJV9_fL8ZbD1-_mtL1xavLxEilz4ZHiWjYx6s4nPvF4If[/img]
Just ID (variety, not group)
Oh no...
It looks like it's probably an emerald, although I've seen some tremolite that occurs in that shade of green.
Incorrect.
Hint: Look at the texture and crystal form.
Amazonite/microcline correct?
Re: Rocks and Minerals B/C
Posted: September 9th, 2017, 6:55 pm
by whythelongface
Is this a Nat-level mineral? If so I would maybe guess spodumene, var. hiddenite.
Re: Rocks and Minerals B/C
Posted: September 9th, 2017, 10:01 pm
by OrigamiPlanet
dxu46 wrote:Wow....
[img]https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcS48r4oJV9_fL8ZbD1-_mtL1xavLxEilz4ZHiWjYx6s4nPvF4If[/img]
Just ID (variety, not group)
Is it olivine? The crystal structure doesn't look entirely like it though so I'm probably wrong
Re: Rocks and Minerals B/C
Posted: September 10th, 2017, 5:50 am
by dxu46
whythelongface wrote:Is this a Nat-level mineral? If so I would maybe guess spodumene, var. hiddenite.
Correct! This was a hard one, your turn.
Re: Rocks and Minerals B/C
Posted: September 10th, 2017, 7:46 am
by whythelongface
[img]http://www.mineralmasterpiece.com/images/Specimens/P1/MMB-766xL_Apatite.jpg[/img]
Let's take a break after that one:
1. Name this mineral in its biological form (what variety exists in the human body?)
2. How will this mineral react to acid?
3. What is the primary industrial use of this mineral?
Re: Rocks and Minerals B/C
Posted: September 10th, 2017, 10:53 am
by OrigamiPlanet
whythelongface wrote:
[img]http://www.mineralmasterpiece.com/images/Specimens/P1/MMB-766xL_Apatite.jpg[/img]
Let's take a break after that one:
1. Name this mineral in its biological form (what variety exists in the human body?)
2. How will this mineral react to acid?
3. What is the primary industrial use of this mineral?
1. Apatite var. Hydroxylapatite
2. It dissolves/is soluble in HCl
3. Manufacture of phosphorus fertilizers
Re: Rocks and Minerals B/C
Posted: September 10th, 2017, 11:13 am
by whythelongface
Simple. Your turn!
Re: Rocks and Minerals B/C
Posted: September 10th, 2017, 11:23 am
by OrigamiPlanet
[img]http://rocks.comparenature.com/PImg/Anthracite25Med_300.jpg[/img]
1. Identify this specimen
2. What major group (Silicates, Hydroxides/Oxides, Igneous Rocks, etc.) does this specimen belong to?
3. Where is this most abundant?
Re: Rocks and Minerals B/C
Posted: September 10th, 2017, 11:58 am
by whythelongface
OrigamiPlanet wrote:
[img]http://rocks.comparenature.com/PImg/Anthracite25Med_300.jpg[/img]
1. Identify this specimen
2. What major group (Silicates, Hydroxides/Oxides, Igneous Rocks, etc.) does this specimen belong to?
3. Where is this most abundant?
1. Obsidian
2. Extrusive igneous rock
3. Usually where a lava flow meets water, as obsidian is formed by the extremely quick cooling of felsic lavas.