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.
Suppose you own a mine in San Benito County, California that produces the best known crystals of benitoite
in the world.
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.
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.
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
Gem mine, one of America's classic mineral localities, was discovered in 1907.
(2) Five fine matrix specimens of benitoite
and neptunite with joaquinite.