Obsidian: Rocks we know we knowDec 21, 2017
Castle Hill Granite
$5.50 inc GST
Dark pink even grained granite. Pink potassium feldspar, cream plagioclase, feldspar, small flakes of biotite. Also green chlorite, quartz and feldspar crystals. Thought to be early Permian in age.
Images are examples of specimens only.
Size and shape may vary.
Specimens are usually no smaller than 75mm in one dimension.
13 in stock