Scioly.org

Posted: **April 9th, 2012, 9:44 pm**

Hmm... (Click to Show Hidden Text)

Limonite and galena?

Posted: **April 9th, 2012, 9:49 pm**

Right on the dot.

Posted: **April 9th, 2012, 9:55 pm**

Posted: **April 9th, 2012, 10:06 pm**

Gross, I hate this mineral... :x (Click to Show Hidden Text)

Barite? (or Baryte)

Posted: **April 9th, 2012, 10:20 pm**

Posted: **April 10th, 2012, 7:00 am**

Posted: **April 10th, 2012, 8:26 am**

. (Click to Show Hidden Text)

Hematite

Posted: **April 10th, 2012, 9:58 am**

Posted: **April 10th, 2012, 6:45 pm**

. (Click to Show Hidden Text)

What is the most common mineral on Earth, and what [i]subclass[/i] of silicates does it belong to?

Posted: **April 10th, 2012, 7:07 pm**

Answer (Click to Show Hidden Text)

Quartz, tectosilicates. If this is correct, quizbowl can post the next question.

Rocks and Minerals Question Marathon