Botryoidal agate with dendrites and a chip of what looks like smoky quartz, Fish Creek, Mt Hood National Forest, Oregon, 2016
Rare Earth
@rrareearthh / rrareearthh.tumblr.com
Mostly my own rock collection, plus geology, archaeology, nature, and probably your rockhounding photos, brought to you by @selfishsteam. The 10p coin I use for size reference is the size of an American quarter.