Advanced: Rocks 2017
 Dec 2, 2017

Igneous, sedimentary, metamorphic. Those are the three main categories of rocks, but there are many, many subtypes. Granite, quartz, limestone, coal, chalk, etc, etc.
For a list of subtypes, go here.

Show us your best rock photos, like the great themepost by mickey2bagz.

Hit list: Diamonds and other gemstones. There are other contests for those.

Good luck!

Important Notice
All entries must abide by the entry requirements as stated in the FAQs

A full list of editing allowances and restrictions for contests can be found here.

Thanks to mickey2bagz for supplying our themepost!
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