Neptunite

A true “box buster” this specimen does fit, diagonally, into a perky. The luster does not show well in the pictures but it is good. The parallel growth and “feathery” appearance indicate this is from an older time, and Kens label confirms it as it was collected in 1970. A great price for this hard to find piece! Ex Ken Roberts Collection

Locality: Benito Mine, San Benito County, California

Composition: Complex silicate KNa₂Li(Fe²⁺, Mn²⁺)₂Ti₂Si₈O₂₄