Quartz
Dudley pegmatite, Penneshaw, Dudley Peninsula, Kangaroo Island, South Australia, Australia
Flat, plate-like crystal of quartz var. cairngorm from the Dudley pegmatite. Crystal is 10cm across, and was probably originally attached to a vugh wall on the underside. The circular depression near the termination contains traces of blue elbaite, and was probably the point of attachment of a gemmy elbaite crystal projecting at right angles from ...
© Ben Grguric