benitoite


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benitoite

[bə′nēd·ə‚wīt]
(mineralogy)
BaTi(SiO3)3 A blue to violet barium-titanium silicate mineral; at one time it was cut and sold as sapphire.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Although oriented toward mineral collectors, some items of interest to gemmologists that appeared in 2014 include tourmaline from Brazil, Tanzania and Nepal; gem-quality wurtzite and colour-change axinite-(Mg) from Merelani, Tanzania; demantoid from Iran; benitoite from California; and daylight-luminescent hyalite opal from Mexico (as reported in this issue of The Journal).
Soon they began searching further afield, and in 1966 they came across the Benitoite Gem mine, where they became acquainted with the lessee, Clarence Cole.
Other rarities are a "rainbow" calcite, which has the unique ability to separate and reflect light into its spectral colours, and the world's largest faceted benitoite gem, a stone the colour of blue sapphire but with the fire and reflective properties of diamond.
A few issues later he offered well-formed benitoite and neptunite crystals on natrolite for $1 to $2.
I want to congratulate you on your fine report on the Benitoite Gem mine (January-February 2008).
Rick Kennedy of Earth's Treasures (www.earthstreas.com) brought to Denver an excellent lot of neptunite from the famous Benitoite Gem mine, San Benito County, California.
The Benitoite Gem mine is located in the Coast Range Mountains in San Benito County, north of the town of Coalinga.
Readers of the article in this issue on the history of the Benitoite Gem mine will note the portion of the story devoted to the 1935 visit to the mine by collecting buddies Ed Swoboda and Pete Bancroft--then high school students.
The Benitoite Gem mine (also known as the Benitoite mine, the Dallas Gem mine or simply the Gem mine) has been known for 100 years as the source of a crystallographically unique and aesthetic mineral and gem species, benitoite.
The Benitoite Gem mine, one of America's classic mineral localities, was discovered in 1907.
(2) Five fine matrix specimens of benitoite and neptunite with joaquinite.