Produced July 16, 1945White Sands Missile Range, New MexicoAt 05:29:45am local time on Monday, July 16th, 1945, the nuclear age began. In a most graphic example of Einstein's famed equation (E = mc 2) a plutonium bomb, referred to as the Gadget with a yield of 21 kilotons (equivalent to the explosive power of 21,000 tons of dynamite) was detonated at the Alamogordo Bombing range, 210 miles south of Los Alamos, New Mexico. One of the products of this nuclear explosion was a green glassy material formed by melting of the surrounding desert sand. Robert Oppenheimer had chosen the name Trinity for the nuclear test and this glassy material is referred to as Trinitite. The radius of the trinitite layer measured ~300 m and was ~2 cm thick. The top of the layer was glassy green while the underside was light tan with sandy inclusions. Trinitite occurs as fragments, agglomerated droplets, and 2-to-3-mm beads which are spheroidal, tear-dropped shaped or oblong. The original trinitite layer was bulldozed under shortly after the blast. The present samples, initially called The Millstone Collection, were collected by a small rock shop called Los Compadres in the late 1940s and later sold to a buyer in Michigan in the 1970s, remaining in Michigan until approximately 2000. Total approximately 200 grams. Glass jar measuring 76.2 x 88.9mm (3 1/2 x 3 in)