Polished Snakeskin Jasper slab SS200 oldest agate in the world Chinese Writing Stone is a

Chinese Writing Stone is a porphyritic basalt (porphyry) with groups and rosettes of plagioclase feldspar

Dimensions at widest points approximately 170 mm  x 75 mm wide x 9 mm thick

Dimensions at widest points approximately 90 mm x 70 mm x 10 mm thick

A matching pair of polished Magnesite (Lemon Chrysoprase) halves with natural rough backs

Polished Snakeskin Jasper slab SS200 oldest agate in the world Chinese Writing Stone is aSS200 Snakeskin Jasper slab, polished on one side. From our mining claims on Turee Creek Station in the Pilbara region of Western Australia. Dimensions approximately 120 mm x 100 mm x 7. 5 mm thick. Weighs 296 grams