Colorless calcite with dusting of red-brown iron Picture jasper with each set cut from

with each set cut from adjacent material so that pieces match

leaving some hollow between layers

This material would most accurately be named "chrysanthemum rhyolite" but you know I can't pass up a goblin-y name like spider jasper

leaving some of the aragonite points hollow

Many of these specimens are speckled with small pits on the faces

Colorless calcite with dusting of red-brown iron Picture jasper with each set cut fromLocale: Santa Eulalia, Chihuahua, Mexico Approx dimensions: 4 x 3 x 1. 25" Approx weight: 388g This calcite specimen from Santa Eulalia has a layer of calcite druzy with several larger modified rhombohedral calcite crystals perched atop. The druzy is well formed, composed of interlocking calcite crystals. The piece appears finely dusted with cinnamon brown color: this is hematite which causes the red and brown coloration of the mineral. UV reactivity