Calcite (pseudo Ulexite) (Ref: MMH-19)
U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
33mm x 19mm x 16mm
minID: 5MT-XAW
$75
Lustrous, blocky crystal of yellow Calcite to 19 x 11 x 6 mm, and spires made up of flat blades of light-yellow Calcite, make up this specimen. The blocky Calcite shows pronounced striations and tiny acicular features on its surface. Small amounts of Ulexite are also present. This is an excellent and rare example of a near complete replacement of Ulexite by Calcite from Boron.ex. Marty Houhoulis (Denver) collection
Data last checked on 30th Jun 2025 - specimen may no longer be available
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From: Bob Griffis Minerals
Buy now from Bob Griffis Minerals
To purchase this mineral you need to click the button above to transfer to the dealer's website. This will open in a new window. Price shown here does not include shipping costs, always confirm price on dealer website before ordering.
Please tell the dealer you found this mineral on minfind.com - help keep minfind.com alive again!
All photos for this item are copyright © Bob Griffis Minerals and may not be used for any other purpose without permission.
See Also
Calcite (pseudo Ulexite) with Ulexite
U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
$70
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From: Bob Griffis Minerals
Calcite
Reward Mine, Russ District, Inyo Co., California, USA
$100
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Calcite
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Calcite on Chrysocolla
Reward Mine, Russ District, Inyo Co., California, USA
$50
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Calcite
Reward Mine, Russ District, Inyo Co., California, USA
$35
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Vanadinite on Calcite
Grey Horse Mine, Riverside District, Dripping Spring Mtns, Pinal Co., Arizona, USA
$96 *
37mm x 35mm x 32mm
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Quartz with Calcite
Bog Mine, American Fork Mining District, Wasatch Mountains, Utah Co., Utah, USA
$150
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Ulexite
U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
$50
75mm x 53mm x 39mm
From: Bob Griffis Minerals
Kernite and Probertite
U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
$40
125mm x 75mm x 71mm
From: Bob Griffis Minerals
Kernite and Probertite
U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
$40
122mm x 82mm x 55mm
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Kernite and Probertite
U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
$35
107mm x 99mm x 51mm
From: Bob Griffis Minerals
Ulexite
U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
$35
91mm x 52mm x 37mm
From: Bob Griffis Minerals
Ulexite
U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
$30
121mm x 42mm x 40mm
From: Bob Griffis Minerals
Ulexite
U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
$25
91mm x 58mm x 29mm
From: Bob Griffis Minerals