Vivid blue gem silica over a chatoyant malachite base gives this piece unusual depth. The rich blue comes from copper minerals such as chrysocolla, and gem silica is considered the rarest variety of chalcedony.
Material from the Inspiration Mine is especially sought after, as the mine was once one of the premier sources and is no longer producing this classic gem silica
71.905 carats / 32.6 x 23.3 x 8.5 mm
Estimate: $2800 - $3000
