Green Opal rough. GOR 124 peanut wood Dimensions approximately 140 mm x

Dimensions approximately 140 mm x 115 mm x 8 mm thick

Dimensions at widest points approximately 80 mm x 65 mm x 12 mm thick

Porphyry is a general term that is used rather loosely for  igneous rocks which contain relatively large isolated crystals set in a fine-grained groundmass

Dimensions at widest points approximately 65 mm x 40 mm x 20 mm thick

CW121   Chinese Writing Stone rough rock

Green Opal rough. GOR 124 peanut wood Dimensions approximately 140 mm xGOR124 Dimensions at widest points approximately 110 mm x 110 mm x 40 mm thick. Weighs 788 grams. From a location south of Kalgoorlie in the Eastern Goldfields of Western Australia.