Polished Rhyolite SR105 peanut Dimensions at widest points approximately

Dimensions at widest points approximately 100 mm x 90 mm x 30 mm thick

DO179  Dendritic Opal rough rock

Dimensions at widest points approximately 150 mm x 100 mm x 11 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

Polished Rhyolite SR105 peanut Dimensions at widest points approximatelySR104 Turee Creek spherulitic Rhyolite rough rock, cut and polished on one side with a naturally weathered back Dimensions at widest points approximately 140 mm x 70 mm x 55 mm thick Weighs 682 grams. From our mining claims on Turee Creek station, SW of Newman in Western Australia Spherulitic rhyolite from Turee Creek (Pilbara, WA), part of the Early Paleoproterozoic Woongarra Rhyolite (~2. 45 Ga): a high silica lava showing striking radial spherulite