26 décembre 2017

Benitoite, Benitoite Gem Mine, San Benito County, California

Lot 2023. The Official State Gemstone of California. Benitoite, Benitoite Gem Mine, San Benito County, California; weighing approximately 2.08 carats and measuring 8.18 x 6.76 x 4.94mm. Sold for US$ 35,000 (€29,528) inc. premium. Photo: Bonhams. Around the turn of the 19th Century, a prospector discovered a blue material that he believed to be sapphire. Examination by experts determined the new gem material to be an unknown mineral. In addition, it turned out that the new material represented a previously unknown... [Lire la suite]
Posté par Alain Truong à 14:20 - - Commentaires [0] - Permalien [#]
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02 septembre 2012

Benitoite: California State Gemstone

Benitoite: California State Gemstone Benitoite is a beautiful blue to blue-purple gemstone that is almost exclusively found in California.
Posté par Alain Truong à 22:21 - - Commentaires [0] - Permalien [#]
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15 août 2012

Benitoite and Neptunite

Benitoite and Neptunite
Posté par Alain Truong à 11:15 - - Commentaires [0] - Permalien [#]
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