A leaf of Jurassic age assigned to Pentoxylon Australia from Talbragar in central-western NSW.

A leaf of Jurassic age assigned to Pentoxylon Australia from Talbragar in central-western NSW.

Sparkling crystal cubes of calcite. This sample is about the size of a Rubik's Cube!

Sparkling crystal cubes of calcite. This sample is about the size of a Rubik's Cube!

A range of Sapphires and Zircons from Inverell, New England region of NSW. Which colour is your favourite?

A range of Sapphires and Zircons from Inverell, New England region of NSW. Photo: David Barnes © State of NSW

Rutilated ‪#‎quartz‬ and ‪#‎amethyst‬, together in a sceptre shape. Found in the New England District of ‪#‎NSW‬.

Rutilated ‪ and ‪ together in a sceptre shape. Found in the New England District of ‪

Have you ever seen 'colour' (precious opal in situ), in a mine like this? Photo taken in #LightningRidge #NSW

Have you ever seen 'colour' (precious opal in situ), in a mine like this?

Patterns of iron and manganese staining on rocks at the foot of the Nobby's Head seaward cliff face. #Newcastle

Patterns of iron and manganese staining on rocks at the foot of the Nobby's Head seaward cliff face.

Lightsaber crystal? http://starwars.wikia.com/wiki/Lightsaber_crystal No, it's a cluster of NSW Amethyst crystal! #MayThe4thBeWithYou #StarWars

Lightsaber crystal? http://starwars.wikia.com/wiki/Lightsaber_crystal No, it's a cluster of NSW Amethyst crystal! #MayThe4thBeWithYou #StarWars

A miner holding half a natural opal-bearing 'nobby' with the cut stone made from the other half of the nobby. #opal

A miner holding half a natural opal-bearing 'nobby' with the cut stone made from the other half of the nobby.

Here's a range of blue & gold coloured sapphires cut in a variety of shapes, from the New England district of NSW.

Here's a range of blue & gold coloured sapphires cut in a variety of shapes, from the New England district of NSW.

This is "Barrier Reef" a large free-form crystal opal from the "Solid Rainbow" collection in #LightningRidge #NSW

This is "Barrier Reef" a large free-form crystal opal from the "Solid Rainbow" collection in

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