Minerals

Queensland Fossil Plants – Dicotyledon and Others – Redbank Plains Formation – 45 Million Years

A nice slab of carbonaceous shale showing numerous preserved plants from the middle Eocene era – circa 45 million years ago – a period regraded as the “dawn of modern life”.

Fossils were found in the Redbank Plains area as early as 1900 by settlers. Most of the sites have been built out which makes the having of specimens all that more cherishable.

A good example 19.0cm by 16.0cm, 3.0cm deep, weighing 1,180gms

Earliest examples of Australian modern plants – if that makes sense.

$65.00

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Queensland Mineral – Rain Forest Jasper [Spherulitic Rhyolite] from the Mount Hay Volcano

Mount Hay is to the west of Rockhampton in Queensland. It is an extinct volcano and it was the volcanic environment that gave rise to this unique form of rhyolite. It is called rainforest jasper because of the rainforest like colour palette.

The underlying rock form is high in silicon and the long cooling process from the volcanic activity allowed for numerous inclusions of quartz, chalcedony etc.

A sizeable example 14.0cm by 9.0cm, 1.0cm deep, weighing 390gm

Striking Mount Hay Jasper – a nice piece

$50.00

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Azurite “Sun” – Copper Mineral, the form, Unique to Malbunka Copper Mine near Areyonga, Northern Territory.

A very nice clean example of a decent sized azurite sun with a couple of smaller examples in the usual kaolinite matrix from the Malbunka Mine.

Azurite formed by the oxidation and weathering of copper deposits – Cu3(CO3)2(OH)2 and this specific indeed unique “sun” structure formed at depth and with high pressure. Monclinic and comes with a variety of colour depths this one Royal to Dark Blue.

The main sun is 45 mm in diameter and has good crystal definition around its edge. The whole sample weighs 80 gm.

Azurite “Sun” structure unique to Australia.

$100.00

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Botryoidal Goethite – Yaraka Queensland

The mineral Goethite or iron oxy-hydroxide here in a nice botryoidal (resembling grapes) crystal form.

Found in the Yaraka Boulder Opal Field 100km east of Blackhall, Queensland. Last count remote Yaraka had an official population of 20 – they all get along.

Small fist sized weighing 350 gm.

Good lustre to the botryoidal form

$35.00

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Rocks and Minerals of Australia – Oliver Chambers

Published by Methuen in Australia a first edition 1976. Very good condition. 246 pages with lots of images, diagrams and maps. And with the striking Crocoite on the front board – see our examples on this website.

Or favourite “Observer Book” part of an Australian contribution to the series. A serious miniature work on the subject and the source of much of Voyager’s knowledge.

The detailed maps at the end and connectivity to the narrative open up the enormous subject to the newcomer

An expert in a day!

$30.00

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Australian Mineral Specimen – Gypsum Selenite with Copper

A very good example of gypsum in selenite form with even crystals of 5mm nicely impregnated with copper salts giving a soft green hue.

Very good example from Pernatty Lagoon, Stuart Shelf South Australia.

Nice crystals with even copper tone

$40.00

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Queensland Fossil Plants – Dicotyledon and Others – Redbank Plains Formation – 45 Million Years

Queensland Mineral – Rain Forest Jasper [Spherulitic Rhyolite] from the Mount Hay Volcano

Azurite “Sun” – Copper Mineral, the form, Unique to Malbunka Copper Mine near Areyonga, Northern Territory.

Botryoidal Goethite – Yaraka Queensland

Rocks and Minerals of Australia – Oliver Chambers

Australian Mineral Specimen – Gypsum Selenite with Copper

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