Polished Golden Amphibolite slab GA151 crystoprase natural back

natural back

Chalcedony grading into silicated magnesite

Dimensions approximately 160 mm x 130 mm x 90 mm thick

6 billion years

Unusual colouration caused by natural iron oxide weathering

Polished Golden Amphibolite slab GA151 crystoprase natural backGA151 A slab, polished on one side. Dimensions at widest points approximately 145 mm x 125 mm x 16 mm thick. Weighs 652 grams. The amphibolite, most likely grunerite , has now been largely altered to hematite, goethite and quartz and it displays a beautiful golden iridescence. Also called "Gold Leaf Stone". It occurs in the Pilbara region of Western Australia on Abydos Station approximately 120 km south of Port Hedland.