Geologists think that was likely igneous in origin, an inclusion in a type of common volcanic rock called pegmatite, common in the region where the stone was found. Like granite, pegmatite's ...

It sits on the southern margin of the Cooglegong Monzogranite, a “tin granite”, and is part of the regionally important Split Rocks Supersuite associated with major pegmatite-hosted lithium ...

January exploration to date has identified a further 3 pegmatite trends covering a combined 3.8 km of strike to the ...