Benitoite – Dallas Gem Mine, New Idria Distr. San Benedito Co., California, USA
 
The intensely blue benitoite crystals stand out in contrast to the snow-white natrolite. The crystals are crystallized with sharp edges and have a beautiful luster. The good clarity of the Benitoite is evident in transmitted light. 
Benitoite is a unique mineral that only forms good crystals in a deposit in the mountains of Northern California.