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Posted: **October 11th, 2012, 6:19 am**

This thread is for asking and answering practice questions about Rocks and Minerals.

Posted: **October 11th, 2012, 3:45 pm**

Can I just start off?

Identify and compare and contrast between the two specimins.

Posted: **October 12th, 2012, 3:11 pm**

A quartz crystal geode
A chert sedimentary rock

Posted: **October 12th, 2012, 10:32 pm**

please specify on what kind of quartz it is. (and compare and contrast between the two)

Posted: **October 18th, 2012, 11:24 pm**

Chalcedony, Chert
microfibrous vs micro-crystalline

Posted: **October 25th, 2012, 2:59 pm**

correct, i believe?

Posted: **October 26th, 2012, 12:14 am**

Posted: **October 26th, 2012, 12:44 pm**

hematite

Posted: **October 26th, 2012, 3:10 pm**

Correct.

Posted: **October 27th, 2012, 10:13 pm**

Identify the type of coal, and any differences between it and other types of coal.

Rocks and Minerals Question Marathon