Obsidian: Rocks we know we knowDec 21, 2017
$5.50 inc GST
Occuring in hornblende-feldspar porphyry dykes in the Biggenden area, Queensland. Displays feldspar phenocrysts up to 3mm in size.
Images are examples of specimens only.
Size and shape may vary.
Specimens are usually no smaller than 75mm in one dimension.
14 in stock