US$ 107.50
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
Weighs 360 grams
Weighs 228 grams
Pollucite slab
Weighs 790grams
Polished fossil stromatolite. Eucapsiphora leakensis. EUC136 Irregully formation Porphyry is a general termEUC136 Very rare fossil stromatolite slab polished on one side. Eucapsiphora leakensis. These small branching columnar stromatolites are from the Mount Leake Sandstone, Earaheedy Group, Western Australia. Location is near the town of Meekatharra. Age is Palaeoproterozoic (1. 6 to 2. 5 billion years). The environment they grew in was most probably a sandy tidal flat or braided river channel. Approx. 105 mm x 75 mm x 7 mm thick. 85 grams.
US$ 107.50
US$ 85.00
US$ 11.95
US$ 27.30
US$ 170.00
US$ 13.00
US$ 27.30