Incorrect.whythelongface wrote:Oh no...dxu46 wrote:Wow....[img]https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcS48r4oJV9_fL8ZbD1-_mtL1xavLxEilz4ZHiWjYx6s4nPvF4If[/img] Just ID (variety, not group)It looks like it's probably an emerald, although I've seen some tremolite that occurs in that shade of green.
Amazonite/microcline correct?dxu46 wrote:Incorrect.whythelongface wrote:Oh no...dxu46 wrote:Wow....[img]https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcS48r4oJV9_fL8ZbD1-_mtL1xavLxEilz4ZHiWjYx6s4nPvF4If[/img] Just ID (variety, not group)It looks like it's probably an emerald, although I've seen some tremolite that occurs in that shade of green.
Hint: Look at the texture and crystal form.
2017 (r/s/n): Hydro: 3/5/18 Robot Arm: na/1/1 Rocks: 1/1/1 2018 (r/s/n): Heli: 2/1/7 Herp: 1/4/4 Mission: 1/1/6 Rocks: 1/1/1 Eco: 6/3/9 2019 (r/s/n): Fossils: 1/1/1 GLM: 1/1/1 Herp: 1/1/5 Mission: 1/1/3 WS: 4/1/10 Top 3 Medals: 144 Golds: 80
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
Correct! This was a hard one, your turn.whythelongface wrote:Is this a Nat-level mineral? If so I would maybe guess spodumene, var. hiddenite.
[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?
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
[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?
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.
