Polished Killaloe Opal rock KO131 Noreena Chinese Writing Stone is a

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

PU163  Purple Chalcedony slab

Approximate dimensions at widest points 160 mm  x 120 mm  x 15 mm thick

Dimensions at widest points approximately 180 mm x 110 mm x 50 mm thick

Dimensions at widest points approximately 115 mm x 85 mm x 50 mm thick

Polished Killaloe Opal rock KO131 Noreena Chinese Writing Stone is aKO131 Killaloe Opal rough rock, cut and polished on one side with a rough, naturally weathered back. Dimensions at widest points approximately 190 mm x 160 mm x 90 mm thick Weighs 3,301 grams Killaloe Opal occurs at a location near Norseman in the Eastern Goldfields of Western Australia.