- published: 10 Mar 2012
- views: 12421
Benitoite (ben-EE-toe-ite) is a rare blue barium titanium silicate mineral, found in hydrothermally altered serpentinite. Benitoite fluoresces under short wave ultraviolet light, appearing bright blue to bluish white in color. The more rarely seen clear to white benitoite crystals fluoresce red under long-wave UV light.
It was first described in 1907 by George D. Louderback, who named it benitoite for its occurrence near the headwaters of the San Benito River in San Benito County, California.
Benitoite occurs in a number of sites, but gemstone quality material has only been found in California.[citation needed] It is California's official state gem.
Benitoite typically occurs with an unusual set of minerals, along with minerals that make up its host rock. Frequently associated minerals include: natrolite, neptunite, joaquinite, serpentine and albite.
Benitoite is a rare mineral found in very few locations including San Benito County, California, Japan and Arkansas. In the San Benito occurrence, it is found in natrolite veins within glaucophane schist within a serpentinite body. In Japan, the mineral occurs in a magnesio-riebeckite-quartz-phlogopite-albite dike cutting a serpentinite body.
Narrated History of the Benitoite Gem Mine
Benitoite gemstone jewelry
Benitoite Interview
Benitoite Mining Area
Looking for Benitoite, petrified wood, and fossils May 1, 2, 5, 6
New Benitoite Mine Specimens July 2011
Idria California Benitoite Placer Claim - 20acres
Idria California San Benito Benitoite Mining area Claim for Sale
Big Benitoite Hiding
#111, Benitoite, Neptunite and Djurleite Specimen
#110, Benitoite Specimen, Druzzy
Etching Benitoite & Neptunite out of Naturalite
#106, Amazing Benitoite and Neptunite Specimen
.5" Royal Blue BENITOITE SharpShiny Trigonal Crystal Dallas Gem Mine CA for sale