Rocks & Minerals B/C 2017

[log10[infinity]]

If I'm not mistaken, vitreous luster also refers to the fact that the mineral appears glassy (doesn't have to be transparent, only reflective), which could describe the linked picture. Hopefully that helped.

[SenseiSushi]

Sorry, this is long overdue.



1. Identify this mineral.
2. Name the most recognizable characteristic of this mineral.

[roadscholar11]

Sorry, this is long overdue.



1. Identify this mineral.
2. Name the most recognizable characteristic of this mineral.

Answer (Click to Show Hidden Text)

Ulexite– it can transmit pictures cuz of its unique "fibrous" structure and is accordingly known as the "TV stone"

[SenseiSushi]

That's correct, your turn!

[roadscholar11]

a) Identify this rock.
b) Explain how it was formed.

[Unome]

Flipped a [strikethrough]coin[/strikethrough] poster end cap to decide (Click to Show Hidden Text)

1) Gneiss? 2) It was compressed and heated.

[roadscholar11]

Flipped a [strikethrough]coin[/strikethrough] poster end cap to decide (Click to Show Hidden Text)

1) Gneiss? 2) It was compressed and heated.

Yeppers! Go ahead.

[Unome]

Hopefully I know what I'm doing (Click to Show Hidden Text)

[img]http://cache1.asset-cache.net/gc/128614419-hand-sample-of-scoria-a-volcanic-igneous-gettyimages.jpg?v=1&c=IWSAsset&k=2&d=KKcqI%2FgVSBJRqR2FAM8AboUy60YIlD4msW%2BnBABhp1G0byzA6EwDJ0FfSa%2FouIJ%2B2SXBHWFAeyiqHPTsAHn%2Faw%3D%3D[/img]
1. ID

[Magikarpmaster629]

Hopefully I know what I'm doing (Click to Show Hidden Text)

[img]http://cache1.asset-cache.net/gc/128614419-hand-sample-of-scoria-a-volcanic-igneous-gettyimages.jpg?v=1&c=IWSAsset&k=2&d=KKcqI%2FgVSBJRqR2FAM8AboUy60YIlD4msW%2BnBABhp1G0byzA6EwDJ0FfSa%2FouIJ%2B2SXBHWFAeyiqHPTsAHn%2Faw%3D%3D[/img]
1. ID

*Flips coin* (Click to Show Hidden Text)

1. Scoria

[Unome]

Hopefully I know what I'm doing (Click to Show Hidden Text)

[img]http://cache1.asset-cache.net/gc/128614419-hand-sample-of-scoria-a-volcanic-igneous-gettyimages.jpg?v=1&c=IWSAsset&k=2&d=KKcqI%2FgVSBJRqR2FAM8AboUy60YIlD4msW%2BnBABhp1G0byzA6EwDJ0FfSa%2FouIJ%2B2SXBHWFAeyiqHPTsAHn%2Faw%3D%3D[/img]
1. ID

*Flips coin* (Click to Show Hidden Text)

1. Scoria

correct! I chose that one specifically for its color.