superb old large Gypsum included with sand (DT floater) Kidwell Coll.

Item Description

A superb, RARE, exceptionally large and pristine, single doubly terminated floater sand-included gypsum crystal from the famous Great Salt Plains National Wildlife Refuge, near Jet, Oklahoma. The multiple terminations are both ends add dramatic context to this large OLD 1962 rarity. Gentle contacting on one side has no actual damage. From the worldwide mineral collection of Albert Lewis Kidwell (January 1, 1919 - August 16, 2008). Al was a well-known mineral collector and research geologist with Carter Oil Company and later Exxon Oil Company in Houston, Texas. The phosphate species Kidwellite was named in his honor in 1974 ( https://www.mindat.org/photo-326405.html ). OLD-TIME, very rare single large gypsum crystal from the noted locale.