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4280.00 CTS POLISHED OPAL SPECIMEN FROM LIGHTNING RIDGE [LRO919]

7874
24

SKU
寸法(mm)
146.000 x 105.000 x 46.700mm
重さ (CT)
4280.000
Body Tone
N3
タイプ
Specimen

This is a natural opal specimen from Lightning ridge Australia.it show some amazing formations in the potch area
Size and weight are approximate.
The colour area has been well polished.
Read this interesting article on this specimen 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.


配送業者 配送先Australia その他の国への配送
FedEx $12.00 / 5 $39.00 / 10
:国
FedEx 、 2以上のアイテムを含む注文で$12.00に割引されます
世界のその他の地域
FedEx 、 2以上のアイテムを含む注文で$39.00に割引されます
Registered Shipping $9.00 / 10 $16.00 / 21
:国
Registered Shipping 、 2以上のアイテムを含む注文で$9.00に割引されます
世界のその他の地域
Registered Shipping 、 2以上のアイテムを含む注文で$16.00に割引されます

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.
Mermaid Beach 、 Australia
確認済み
44298フィードバック

  • pompey27
    pompey27
    ポジティブ

    And to this stone is good

  • pompey27
    pompey27
    ポジティブ

    Very good, good choice, thanks

  • pompey27
    pompey27
    ポジティブ

    Happy Christmas, good stone thank you!

  • deinopal
    deinopal
    ポジティブ

    Thank you!

5%
クーポンコード SEDADEALS
まで有効
2nd Jan 2025

監査

この製品はOpal Sheriffによって監査され、次のことが判明しました:
  • 説明が正確
  • 正確な写真

Comments

The Verified Seller has provided accurate and complete information for this Opal including weight, dimensions and if any treatment

この監査は4年前にリクエストされました
最終更新4年前

発送詳細

配送:
$16.00 21日 ( Registered Shipping経由)
発送元:
Australia

支払いオプション

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この販売者は、 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 : 824941
始まります : 18th December 2024 08:24 pm PST
* すべての価格はUSDで表記されています