THE PREMIER MARKETPLACE FOR REAL OPALS
$38.00 USD
価格
1455
2

280 CTS POTCH PARCEL WITH AMAZING PATTERNS-FOR PICTURE STONES CUTRM

SKU
BZ1487
寸法(mm)
83.000 x 55.000 x 8.000mm
重さ (CT)
280.000
タイプ
Rough

This is a natural opal rough slabs from Lightning ridge Australia.it show some amazing formations in the potch . They will cut interesting picture stones.

photo taken with the rough wet.

Read this interesting article on one of these specimens done by  Dr Simon pecover (BA Earth Science, MSc & PhD)* Research Gemmologist and Geoscientist .

What an amazing opal-layered-folded structure is displayed by this specimen.

Lately I have been doing more research on these types of structures in
Australian opal, as they closely resemble "Kelvin-Helmholtz" instability
billows and folds, which can be formed in highly viscous fluids subjected to
shear instability conditions; especially when such conditions are imposed on
density stratified viscous non-Newtonian fluids subjected to seismic shaking
(something that would be expected to have occurred in a
tectonically-generated fault-controlled opal-vein-forming environment).

Such structures are known to form in layered fluids displaying density
gradients, particularly where less dense fluid layers sit on top of denser
fluid layers. When these layers are subjected to shear flow, instability
arises because of the density contrasts; with orientation preserved through
continuous folding, thereby defining the direction of turbulent flow.

Importantly, understanding the shear-strain environment of GAB opal deposit
formation provides important exploration clues as to where opal deposits may
have been concentrated in the host sedimentary rocks of this extraordinarily
unique gem-opal-rich geological basin.

 it is a important piece which demonstrates the vigorous shear-dominated
hydrodynamic and rheological environment under which the opal vein deposits
of Lightning Ridge were likely formed.

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:数量以上のアイテムを含む注文では、:プロバイダーは $39.00 に割引されます
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世界のその他の地域
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sedaopals
sedaopals
Discover the magic of opals at SedaOpals, where every stone tells a unique story. Paul Sedawie, the heart and soul of SedaOpals, began his journey with a humble piece of boulder rough at 14, sparking a lifelong passion for these mesmerizing gemstones. With over 40 years in the opal industry, Paul’s dedication has taken him from the rugged landscapes of Lightning Ridge to prestigious gem shows around the world. Paul, a former president of the Opal Association and an author of several opal books, shares his vast knowledge and passion with enthusiasts globally. He’s even made the largest donation of opalized fossils and curiosities to the Australian Opal Centre at Lightning Ridge. At SedaOpals, Paul and his sons offer a meticulously curated collection of opals, each handpicked for its exceptional beauty and character. Whether you’re a seasoned collector or new to the world of opals, you’ll find a stunning array of black opals, boulder opals, and crystal opals to explore. Join us in celebrating the timeless beauty and craftsmanship of opals. Welcome to SedaOpals, where every opal is a piece of art.
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  • dt1972
    dt1972
    ポジティブ

    Good seller.

  • hosea
    hosea
    ポジティブ

    have the tracking?

  • laurenlambert
    laurenlambert
    ポジティブ

    The stone was more beautiful in person than in the photos. It arrived very quickly. I would definitely recommend this seller and would buy from him again.

  • fissure
    fissure
    ポジティブ

    Always a pleasure to deal with you! Thanks for fast shipping :)

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発送詳細

配送:
$16.00 Registered Shipping 経由の日数をカウント
発送元:
Australia

支払いオプション

  • paypal
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  • gempay
この出品者は、Australia での取引に 10.00% 税金を追加します。

概要

リストタイプ : Standard
製品番号 : 1208922
始まります : 7th November 2024 05:19 pm PST
* すべての価格は:通貨で表示されます