Green Chert is a cryptocrystalline quartz stone metamorphosed from Fuchsite. The stone was formed when the Fuchsite vein was subjected to intense pressure and dissolution from super hot ground waters which partially dissolved the Fuchsite into a silica solution, forming large boulders. The deposit now sits on the side of a large red/brown quartzite hill, from which the silica enrichment originated.

The stone is mined from a deposit near Pear Creek, a small creek crossing the Port Hedland to Marble Bar road in the Pilbara region of Western Australia.

The stone is similar in colour and appearance to Aventurine.

The stone is semi translucent to translucent.

Much of the deposit retains the emerald green colouring of Fuchsite, but can also be found in lighter shades of green.

Green Chert has a hardness of 6 – 6.5 and is best suited to carvings and ornaments.