Plume Agate Rough from Idaho and Oregon

We mined these plume agates from our “archives”. We will be adding different varieties as we come across them in our “excavation”. Plume agates are beautiful and offer a certain three-dimensional mystery to finished stones.

Agate is a form of microcrystaline quartz. It is usually formed in nodules and has transparent, or translucent portions. As with all of the other species in the quartz family, agate takes a high polish with cerium oxide, but also takes a fine polish with tin oxide and diamond. Mohs hardness 7.