Formula: Mn²⁺₃B₇O₁₃Cl
Mineral class: borates
Crystal system: orthorhombic
Mohs scale: 7
Density (g/cm³): 3.48 - 3.50
Refractive index: 1.732 - 1.744
Cleavage: -
Colors: colorless, violet
Luster: vitreous
Fluorescence: -
Pleochroism: -
Largest Chambersite: 2 cm?
Deposits:
Barbers Hill Salt Dome / Mont Belvieu / Chambers County / Texas / USA
Venice Salt Dome / Lake Judge Perez (Lake Hermitage) / Venice / Plaquemines Parish / Lousiana / USA
Darrow Salt Dome / Donaldsonville / Ascension Parish / Louisiana / USA
Truskavets / Ukraine
Zhongxinchun B-Mn Deposit / Pinggu Distr. / Beijing / China
Dongshiuchang B-Mn Deposit / Zunhua Distr. / Tangshan / China
1st Description: 1962
Name: in allusion to the deposit in Chambers County / Texas / USA
History:
• Chambersite crystals were discovered in 1957 in brine returns from a gas storage well (storage well no. 1 / Texas Natural Gasoline Corporation) in the Barber's Hill salt dome, Chambers County, Texas.
• The crystals of the first discovery were described in 1962 by R.M. Honea and F.R. Beck.
• Description of new finds in China by D. Fan, P. Yang, R. Wang, in 1999.

Chambersite Mineral

Size of the crystal: 0.8 x 0.8 x 0.8 cm

Origin: Barbers Hill Salt Dome / Mont Belvieu / Chambers County / Texas / USA

Photo by kind permission of © www.irocks.com

Chambersite Mineral

Size of the crystal: 0.7 x 0.6 x 0.6 cm

Origin: Barbers Hill Salt Dome / Mont Belvieu / Chambers County / Texas / USA

Photo by kind permission of © www.irocks.com

Chambersite Mineral

Size of the crystal: ~ 0.8 cm

Origin: Barbers Hill Salt Dome / Mont Belvieu / Chambers County / Texas / USA

Photo by kind permission of © www.mineralman.com

Chambersite

Weight: 0.34 ct

Origin: Barbers Hill Salt Dome / Mont Belvieu / Chambers County / Texas / USA

Photo by kind permission of © www.rocklogic.biz

Chambersite

Weight: 0.32 ct

Origin: Venice Salt Dome / Lake Hermitage / Plaquemines Parish / Lousiana / USA

Photo by kind permission of © Darlene Cobler

Chambersite

Size: 0.2 cm
Weight: 0.02 ct
Origin: Chambers County / Texas / USA

Photo by kind permission of © www.thegemtrader.com