mineral general info

Gypsum

Origin: Red River Floodway, Winnipeg, Manitoba, Canada

Sample size: 4 x 4 x 5.5 cm

Sharp brown scalenohedral "dogtooth" crystals of calcite to 33 mm in length are covering the top of the matrix. The calcites are partly draped by colorless clear crystallized gypsum.

Origin: Chihuahua, Mexico

Sample size: 9.5 x 6.2 x 5.2 cm

Photo courtesy of:

Dan Weinrich

Selenite phantom crystal with a spike of mineral-included calcite in the middle

Extended arrowhead twin crystal

Origin: Lake Gilles, South Australia, Australia

Ex. Marty Lewadny Collection

Sample size: 9.2 x 3.5 x 2.9 cm (top/2nd row), 6.8 x 3.3 x 3.3 cm (bottom)

Origin: Roden, Zaragoza, Spain

Ex. Ernie Schlichter collection

Sample size: 6.1 x 5.5 x 4 cm

Origin: Red River Floodway, nr. Winnipeg, Canada

Ex. Marty Lewadny collection

Sample size: 12.0 x 10.7 x 5.2 cm

Photo courtesy of:

Rob Lavinsky

The Arkenstone

Origin: Bennstadt, Halle, Saxony, Germany

Sample size: 3 x 3 cm

Photo courtesy of:

Diederik Visser

Diederik Visser Minerals & Petrological Services

Origin: Comet Mine, Tasmania, Australia

Sample size: unknown

Sample owner: Brian Carney

Photo courtesy of:

Steve Sorrell

Crocoite.com