Rocks and Minerals B/C

[dxu46]

Rocks it is.

Rock Question (Click to Show Hidden Text)

[img]https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSru7QRo8nXuknKIhz6tDFiHTAOAn48r1RdJ0zpWkgVU29y9idb[/img]
1. This image is an example of what rock under a microscope?
2. What are the individual pieces called?
3. Does this specimen effervesce?
4. What is the composition of this rock?

Answer (Click to Show Hidden Text)

1. Diatomite/Diatomaceous earth
2. Diatoms
3. No, because it is siliceous, not calcareous
4. Silicon tests of diatoms

Good job, your turn!

[whythelongface]

Question (Click to Show Hidden Text)

[img]http://www.sandatlas.org/wp-content/uploads/00647-IMG_8385-7-cm-staurolite-garnet-kyanite-schist.jpg[/img]
1. Name the rock.
2. This rock is classified under what grade of metamorphism?
3. Name the red mineral. What is one use of this mineral?
4. Name the black mineral. What is the use of this mineral?
5. Name the blue mineral. What is its hardness?

[dxu46]

Question (Click to Show Hidden Text)

[img]http://www.sandatlas.org/wp-content/uploads/00647-IMG_8385-7-cm-staurolite-garnet-kyanite-schist.jpg[/img]
1. Name the rock.
2. This rock is classified under what grade of metamorphism?
3. Name the red mineral. What is one use of this mineral?
4. Name the black mineral. What is the use of this mineral?
5. Name the blue mineral. What is its hardness?

1. Schist [garnet]
2. Medium grade
3. Garnet, abrasives
4. Staurolite?, amulets/charms
5. Kyanite, hardness varies because of anisotropicity (probably spelled it wrong), different hardnesses due to cleavage (lower hardness on vertical angles, higher on horizontal.

[whythelongface]

For staurolite, all I was looking for was "index mineral".

Your turn!

[dxu46]

Question (Click to Show Hidden Text)

[img]https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSJWW5OzAMAnk5G5PbgXZJ__BjrClkZVVpmzpK8LzHbuSuAsuAy[/img]
1. What is this mineral?
2. Name a state where this mineral is found in good form.
3. Is this [b][u]specimen[/u][/b] tarnished?  If so, how does this mineral tarnish?
4. What is the primary industrial use for this mineral?

[whythelongface]

Question (Click to Show Hidden Text)

[img]https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSJWW5OzAMAnk5G5PbgXZJ__BjrClkZVVpmzpK8LzHbuSuAsuAy[/img]
1. What is this mineral?
2. Name a state where this mineral is found in good form.
3. Is this [b][u]specimen[/u][/b] tarnished?  If so, how does this mineral tarnish?
4. What is the primary industrial use for this mineral?

Answer (Click to Show Hidden Text)

1. Chalcopyrite
2. Um, I don't know the specific state, but I know the region, and so I will guess Colorado.
3. The specimen is tarnished slightly, which occurs due to the oxidation of the CuFeS2.
4. Copper ore, along with native copper, bornite, and cuprite, which it is commonly associated with.

[dxu46]

Question (Click to Show Hidden Text)

[img]https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSJWW5OzAMAnk5G5PbgXZJ__BjrClkZVVpmzpK8LzHbuSuAsuAy[/img]
1. What is this mineral?
2. Name a state where this mineral is found in good form.
3. Is this [b][u]specimen[/u][/b] tarnished?  If so, how does this mineral tarnish?
4. What is the primary industrial use for this mineral?

Answer (Click to Show Hidden Text)

1. Chalcopyrite
2. Um, I don't know the specific state, but I know the region, and so I will guess Colorado.
3. The specimen is tarnished slightly, which occurs due to the oxidation of the CuFeS2.
4. Copper ore, along with native copper, bornite, and cuprite, which it is commonly associated with.

Correct, your turn!

[whythelongface]

Question (Click to Show Hidden Text)

Just some potpourri-style questions now:
1. Kunzite is a variety of what mineral?
2. Garnet begins to form at what metamorphic facies?
3. Why is fluoride a useful ingredient in toothpaste?
4. 12-sided crystals of pyrite are known as what?
5. What is a pumice raft, and how is it produced?
6. What is the difference between high quartz and low quartz?
7. Define cryptocrystallinity.

[OrigamiPlanet]

Question (Click to Show Hidden Text)

Just some potpourri-style questions now:
1. Kunzite is a variety of what mineral?
2. Garnet begins to form at what metamorphic facies?
3. Why is fluoride a useful ingredient in toothpaste?
4. 12-sided crystals of pyrite are known as what?
5. What is a pumice raft, and how is it produced?
6. What is the difference between high quartz and low quartz?
7. Define cryptocrystallinity.

[b]Answer[/b] (Click to Show Hidden Text)

[spoiler]1. Spodumene
2. Amphibole Facies (Intermediate Grade) and a bit of Granulite Facies (High Grade)
3. It helps prevent tooth decay
4. Is it a pyritohedron? Not sure...  :?: 
5. As the name implies, it's a raft made of pumice. This is formed from ocean-based/near-ocean volcanic activity.
6. This varies based on the temperature. Beta (High) quartz forms from extreme heat; it is Alpha (Low) quartz when cooled.
7. The crystal structure is noticeable IF and ONLY IF it one magnifies in closer.[/spoiler]

[whythelongface]

Pretty good. I was looking for "replacement of hydroxyapatite anamel with fluorapatite" for number 3, but I should've specified. Everything else appears correct.

Your turn, and don't hesitate to throw some real curveballs.