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$30.00
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07/09/2019 12:31 pm
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RHYOLITE SPECIMEN -POLISHED -72 GRAMS [MX949 ]

SKU
Dimensions (mm)
x x mm
Weight (cts)
Colours

 

RHYOLITE FROM MT MAY

QUEENSLAND- RAINFOREST JASPER

NATURAL

POLISHED ONE SIDE

WEIGHT 72 GRAMS APP

SIZE 90 X 68 X 7 MM APP

Rhyolite can be considered as the extrusive equivalent to the plutonic granite rock, and consequently, outcroppings of it often bear a resemblance to granite. Due to their high content of silica and low iron and magnesium contents, rhyolite melts are highly polymerized and form highly viscous lavas. They can also occur as breccias or in volcanic plugs and dikes. Rhyolites that cool too quickly to grow crystals form a natural glass or vitrophyre, also called obsidian. Slower cooling forms microscopic crystals in the lava and results in textures such as flow foliations, spherulitic, nodular, and lithophysal structures. Some rhyolite is highly vesicular pumice. Many eruptions of rhyolite are highly explosive and the deposits may consist of fallout tephra or of ignimbrites.

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Rest of the world
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mineralgemworld
mineralgemworld
MEMBER OF THE [ICA]  INTERNATIONAL COLOURED STONE ASSOCIATION AND PRESIDENT OF THE OPAL ASSOCIATION. We have a retail shop/museum at the Gold Coast Opal and Gem Centre 25 surfers av mermaid waters Qld Australia .4218 open mon to sat 10 to 5
Surfers Paradise, Australia
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Bids History (1)
greenfingers
Purchased from this seller previously
4 years ago
$29.00

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Shipping Details

Shipping:
$16.00 21 days via Registered Shipping
Ships from:
Australia

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Overview

Listing Type : Standard
Product ID : 75710
Starting Bid : $29
Starts : 5th September 2019 06:00 am AEST
Ends : 8th September 2019 05:31 am AEST
* All prices are in USD