Re: Need to know if this is a Geode..
Samantha, it is possible that it is a very weathered geode. A geode usually has a rhyolite exterior and some type of mineral interior such as agate, druzy quartz, crystal quartz, calcite, etc.
Sometimes several small geodes are welded together and look like yours.
If you do cut it, you will find out for sure. It will probaly polish also.
BTW, I am a member of Deming Gem and Mineral, am a sawyer, and have cut and polished many geodes.
Hope this helps.
From paul browning - April 04, 2012 at 03:40:44