Barium Collection

Benitoite was discovered in 1906 near the San Benito river in California which remains the only known locality for this (barium titanium silicate) mineral

Sunday stone, a calendar in rock
Formed in a Tyneside coal mine in the 1800s, the white mineral barium sulphate, settled out in a water trough and during working shifts was blackened by coal dust

Psilomelane
A bright black botryoidal mass of psilomelane. Psilomelane comprises of (barium manganese oxide hydroxide). Specimen from Monkstone mine, Brent Tor, Devon

Benitoite crystal and cut stone
Benitoite was discovered in 1906 near the San Benito river in California which remains the only known locality for this (barium titanium silicate) mineral

Benitoite cut stone
Benitoite was discovered in 1906 near the San Benito river in California which remains the only known locality for this (barium titanium silicate mineral)

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