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121.5 CTS PINK MOOKAITE FROM WEST AUSTRALIA [F5617]

SKU
Afmetingen (mm)
52.000 x 31.000 x 10.000mm
Gewicht (cts)
121.500
Type
Rough
Kleuren

PINK MOOKAITE FROM AUSTRALIA

ROUGH SLAB

This is a natural untreated specimen slab found in the Gascoyne region near Carnarvon in West Australia in 2011- previous to this only pink opal was from Peru. This material has various shades of pink with interesting white lines through some specimens.The pink opal derives its color from trace amounts of included organic compounds known as quinones. These opals range from opaque to translucent.. This may be kept as a specimen cut into stones or made into a carving.We have taken the photo with the stone wet as this is how it will look polished.

This is what the West Australian mine dept says about Pink Opal

Pink opal ‘Pink opal’ is a prospectors’ name applied to a different variety of mookaite that outcrops as a persistent bed of extremely bright pink opalized radiolarite near Binthalya. At this site, pink opal is present as a dominant, horizontal bed within zones of coloured porcellanites located beneath a surface-brecciated zone in which angular fragments of pink porcellanite have been cemented by iron and silica solutions to produce an attractive pink breccia. The pink zone beneath has already been tested by trial mining to ascertain the extent and consistency of the pink, opalized material.

Examination of pink opal thin sections has confirmed the rock is radiolarite with a dominantly isotropic, finegrained mineral composition. Although not verified by XRD analysis, the pink opal’s physical and visible optical properties suggest it is predominantly opaline silica, having a lower bulk density than the locally porcellanized mookaite material. Pink opal commonly shows liesegang banding and often contains small vugs and fine fractures infilled with microcrystalline quartz. Microscopic, lustrous grains within the rock result from reflections of granular quartz where it has infilled pores and replaced radiolarian structures. In a manner similar to the origin of mookaite, the resilicification of the Windalia Radiolarite forming the pink opal porcellanite has resulted in a visually attractive, bright pink material displaying a high vitreous lustre. Pink opal is extremely hard and brittle with a conchoidal fracture . These properties allow pink opal to take a high polish, making it suitable for the production of colourful, polished tumbled stones, cabochons, and other artworks .

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Registered Shipping wordt verdisconteerd tot $16.00 bij bestellingen met 2 of meer artikelen

sedagems
Hi Welcome to the Sedagems store, Run by Paul Sedawie and specializing in Australian sapphires and gems stones he has collected on his many buying trips world wide. All stock has a money back guarantee as your continued business is our business.
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Geverifieerd
18988e feedback

  • gemarab
    gemarab
    Positief

    Great and clear sapphire, beautiful cut ! Great packaging

  • marcopaulo
    marcopaulo
    Negatief

    Not as pictured and underweight by 1.52ct.

  • marcopaulo
    marcopaulo
    Positief

    As pictured but unweight by .14 ct, will accept.

  • js20031
    js20031
    Positief

    AAAA+++ Very Happy! Just like the pic.

Audit

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Overzicht

Vermeldingstype : Standard
Product-ID : 462674
Begint : 7th November 2024 05:41 pm PST
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