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Jonesite : Ba4(K,Na)2Ti4Al2[O|(SiO4)2|Si3O9]2 · 6H2O | |
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Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA This is a specimen which has numerous crystals of jonesite as singles. Associated minerals include neptunite and joaquinite. The crystal pictured here is 3.5 mm which is MONSTEROUS for the species! |
| © 1995-2001 Trinity Mineral Co. | Photo ID: 1483 View Count: 968 |
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Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA Shown is a 4mm. by 3mm. spray of Jonesite crystals in Natrolite on Crossite matrix, that I etched out of one of the very last batches of "mine run" material from the Benitoite Gem Mine in 2007, courtesy of John Veevaert. It was photographed with a digital camera through my microscope at 10X. It is adjacent to both a Neptunite and a Benitoite ... |
| © g.slak 2008 | Photo ID: 179060 View Count: 119 |
Jonesite : Ba4(K,Na)2Ti4Al2[O|(SiO4)2|Si3O9]2 · 6H2O, Neptunite : Na2KLi(Fe2+,Mn2+)2Ti2[Si8O24], Benitoite : BaTi[Si3O9], Natrolite : Na2[Al2Si3O10] · 2H2O, Crossite | |
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Dallas Gem Mine (Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA Shown is a 4cm. wide photo of a chunk of Crossite matrix from the Benitoite Gem Mine, acquired from John Veevaert in one of the very last batches of mine rough in 2007, just after the mine was closed. The piece was etched with HCl to remove its deep covering of snowy white Natrolite, revealing first an upright black Neptunite crystal, then a ... |
| © g.slak 2008 | Photo ID: 198724 View Count: 57 |
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