These fluorites are from the Okorusu Mine in the Otjiwarongo Dist. of the Otjozondjupa Region of Namibia. This is an open pit operation that is most famous for the variety of fluorite specimens found there. Fluorite is a halide mineral that contains the elements Ca and F.Specimens from this locale are commonly cut from small vugs found in large massive pieces. The pieces are removed and the excess fluorite is then removed and trimmed. This is a plate of green fluorite crystals with zones of blue that are translucent to transparent. They have multiple purple phantoms along the edges. This piece measures 2 7/8 1 15/16 x 1 inches or 73 x 48 x 25 mm.