US$ 10.71
the richer the iron the deeper the color
" represent an extinct lineage of aquatic arthropods classified within the order Eurypterida
Fossil Significance
The genus was first named and described by Edward Drinker Cope in 1877
Stunning Glass Selenite | Utah shark teeth the richer the iron theStunning Glass Selenite from South Central Utah, Wayne County USA Approx. dimensions: 9" x 10" x 1. 5" Approx. weight: 6 lbs. 11 oz. Selenite, satin spar, desert rose, gypsum flower are crystal habit varieties of the mineral gypsum. All varieties of gypsum, including selenite and alabaster, are composed of calcium sulfate dihydrate, with the chemical formula CaSO2HO.