AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Oklahoma > Gypsum var. Selenite with hour-glass shaped zoning

Gypsum var. Selenite with hour-glass shaped zoning from Great Salt Plains, near Jet, Alfalfa County, Oklahoma

Photo below under shortwave ultraviolet illumination:

Photo below under longwave ultraviolet illumination:

DESCRIPTION:	No. 79256
Mineral:	Gypsum var. Selenite with hour-glass shaped zoning
Locality:	Great Salt Plains, near Jet, Alfalfa County, Oklahoma
Description:	Doubly terminated prismatic selenite crystals, the colorless variety of the mineral species gypsum, with hour-glass-shaped zones of brown clay inclusions. One edge has a thin cleavage face. Fluoresces-phosphoresces under LW-SW UV illumination. Ex. Ara T. Dildilvan collection
Overall Size:	40x22x16 mm
Crystals:	18-40 mm
Archived:	For reference only

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