Polished Porphyry slab. PO 130 Kumarina Agate DOT101 Tumble polished Dendritic Opal

DOT101  Tumble polished Dendritic Opal

BM315  Brecciated  Mookaite slab

OG149   Polished orbicular granite with natural rough back

RFJ134  Rhyolite (Rainforest Jasper) rough rock

Weighs 366 grams

Polished Porphyry slab. PO 130 Kumarina Agate DOT101 Tumble polished Dendritic OpalPO130. Pink porphyry slab, cut and polished on one side. From Mindoolah, Western Australia. Dimensions at widest points approximately 270 mm x 150 mm x 8 mm thick. Weighs 711 grams. 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. The porphyry pictured here has pinkish coloured clinozoisite crystals set in a ground mass of dolerite. The