Opal Specimen Jar — Mintabie, SA

Precious opal from the Mintabie opal field in far north South Australia. Each jar holds 50 ct (10 g), and every stone shows play of colour, best seen wet.

Mintabie opal fields sits in hard Ordovician sandstone, more than 300 million years older than the Cretaceous host rock at Coober Pedy and Lightning Ridge.