Chambersite (closeup), Chambers County, Texas
Chambersite, a Manganese Borate
Locality: Chambers County, Texas found in the Mont Belvieu Salt Dome located in Barber's Hill, Texas (a strategic petroleum reserve).
Chemical Formula: Mn3B7O13Cl
Crystal System: Orthorhombic
Specimen size: .375 in x .375 in x .3125 in
Specimen weight: .77 grams
In the Arthur E. Smith Collection, Wheaton College, Wheaton, Illinois.
Additonal Information: Chambersite was first discovered at Barber's Hill in 1957 in brine returns from the Mont Belvieu Salt Dome.