Selenite, 28 specimens per flat Deinonychus They were deposited during the

They were deposited during the Early Esmian to Late Pragian Ages

it had chisel-like teeth

While it had a distinctive armored bull-like head and a more primitive braincase

The snout curved slightly upward and was rounded at the tip

Selenite, 28 specimens per flat Deinonychus They were deposited during the28 Specimens of Argonite Per Flat In 2x2 Inch Boxes. Selenite is a form of the mineral Gypsum (Hydrated Calcium Sulfate CaSO4 2(H2O). These crystals of Selenite are of a rare needle like variety. Some Selenite crystals are up to 50 feet long. Gypsum is one of the more common minerals in sedimentary environments. It is a major rock forming mineral that produces massive beds, usually from precipitation out of highly saline waters. Since it forms easily