Jelly Bean Jasper polished slab JBJ347 Citron chrysoprase A slab of Amethyst

A  slab of Amethyst

a banded iron formation

Dimensions at widest points approximately 85 mm x 65 mm x 20 mm thick

Approximate weight of each piece is between 12 and 42 grams

Dimensions at widest points approximately 140 mm x 140 mm x 55 mm thick

Jelly Bean Jasper polished slab JBJ347 Citron chrysoprase A slab of AmethystJBJ347 Jelly Bean Jasper or Red Jasper Conglomerate in Hematite rich matrix. A slab, polished on one side . Dimensions at widest points approximately 110 mm x 85 mm x 8 mm thick. Weighs: 220 grams It occurs in a geological unit called the "Mt. McGrath Formation" which has an age of close to 2 billion years. Nearest town is Paraburdoo in the Pilbara region of Western Australia.