Mount Blanco Mine (Mount
Blanco deposit; Mount Blanco adit), Mount Blanco, Black Mts, Furnace
Creek District (Furnace Creek Borate District), Death Valley National
Park, Inyo Co., California, USA
is a hydrated borate
mineral. It occurs principally as an alteration product of Inyoite,
another borate mineral. Meyerhofferite is rarely cut as a gem because it is
very soft, has perfect cleavage and since crystals are
very rarely large enough or clean enough. Gems are an
oddity for collectors of the rare and unusual.
Natural Meyerhofferite was discovered in 1914 in Death
Valley, California. It is named for German chemist Wilhelm Meyerhoffer (1864-1906), collaborator with
J. H. van't Hoff on the composition
and origin of saline minerals, who first synthesized the compound.
of Meyerhofferite is in the USA, from the Mt. Blanco
deposit and along Gower Gulch, Furnace Creek district,
Death Valley, Inyo County, and in the Kramer borate
deposit, Boron, Kern County, California. At Mesa del
Almo, 13 km southeast of Magdalena, Sonora, Mexico.
In Argentina, at the Anita mine, Sijes district, and
in the Tincalayu borax deposit, Salar del Hombre Muerto,
Salta Province. In Turkey, from many deposits in the
Bigadiç borate district, Balikesir Province; in the
Killik and Espey borate mines, near Emet, Kütahya Province.
At the Inder borate deposit, Kazakhstan.