This blue version of the classic tigereye is also sometimes called hawkeye
and dark blue to black banded agate
The chemical formula of quartz is SiO2
an effect called chatoyancy
It has banding in translucent white
CHM115c Chrysocolla Cabochon Tumbling Materials This blue version of theThis cabochon is polished out of Chrysocolla rough from Mexico, and shows saturated blue green colors. 36mm x 27mm Designer Cabochons: The Gem Shop, Inc. produces free form designer cabochons for the custom metal smith, hobbyist, and collector. All of the cabs shown are cut and polished by hand in Cedarburg, Wisconsin. The Gem Shop, Inc. specializes in fine agates and fine jaspers including Laguna Agate, Agua Nueva Agate, Natural Druzy, Lace Agate,