Hydroboracite
Origin: Thompson mine, Death Valley, Inyo Co., California, U.S.A.
Owner: Lou Perloff
Microscopic image
Photo-Atlas
of Minerals
Sample size: about 2.5 cm wide
Origin: U.S. Borax Open Pit, Boron, Kern Co., California, U.S.A.
Owner: Milton Speckels
Microscopic image, 5.9 x (left), 2.2 x (right)
Origin: Panderma dist., Balikesir, Turkey
Owner: Milton Speckels
Sample size: about 5 cm
Photo-Atlas
of Minerals
Origin: Lake Inder, Kazakhstan
Sample size: 4 x 7 cm
Origin: Esbey Mine, Emet, Turkey
Sample size: 5.5 x 8 cm
Origin: Niedersachsenwerfen, Harz, Germany
Sample size: 5 x 6 cm
Origin: Thomson Mine, Furnace Creek, Inyo Co, California, U.S.A.
Sample size: 7 x 6 x 4.5 cm
Origin: Thomson Mine, near Ryan, California
Sample size: 5.8 x 4.5 x 4.5 cm
White to clear radial, acicular crystals to 4mm on yellowish to clear
prismatic
preobrazhenskite (dominant mineral) crystals to 1 mm.
Sample size: 7 x 5 x 3 cm
Origin: Boron Open Pit, Boron, Kern Co., California, United States
Ex. Kidwell collection
Sample size: 4.5 x 3 x 3 cm
Origin: Thompson Mine, Ryan, Death Valley, Inyo Co., California, U.S.A.
Sample size: 7.8 x 7.3 x 6.1 cm
Origin: Boraxo Mine (Kern Borate; Boraxo Deposit; Boraxo No. 1 and No.
2; Clara Claim; Thompson Mine), Inyo Co., California, U.S.A.
Sample size: 7.9 x 5.6 x 3.6 cm
