Gypsum (var Selenite)

A classic example from this famous Canadian locality, this specimen represents a typical habit composed of twinned selenite crystals formed within clay beds as floater aggregates. The Red River Floodway in Winnipeg is famous for producing these striking gypsum specimens, material from there are now rarely encountered, making this an increasingly desirable Canadian classic.

It' s a robust, rounded ball of crystallized gypsum that has formed from the core, which stout, diverging, twinned selenite crystals radiate outward. The main crystals are fairly matte, showing slight surface etching, but they remain gemmy with an attractive champagne hue, reaching up to 32 mm in length. It also exhibits a soft, ghostly white fluorescence under ultraviolet light.