I found this gem while poking around Flood Bay this afternoon! It’s a fortification and a floater agate, which is mostly micro-crystalline quartz.
Last weekend, my I taught my boyfriend about agate hunting, and we found a number of them. There’s a corner of this one (left) that’s broken to reveal very fine banding, but it’s too small to photograph with my iPhone. Instead, I wanted to photograph the (admittedly less photogenic) exterior, which represents a complete agate. The surface is what would have been touching the vesicle in which the agate formed. The bands are in the interior of the agate.