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40 CTS OPAL FOSSIL PINEAPPLE- GLAUBERITE /// FO-694-FOSSIL OPALS

SKU
FO-694
寸法(mm)
35.000 x 29.000 x 16.000mm
重さ (CT)
40.000
Shape
Freeform
タイプ
Specimen

OPALISED FOSSIL PINEAPPLE

BLUE MAUVE

One of the rarest and most fascinating types of opal comes in the shape of a palm-sized cluster of radiating points that resembles a pineapple. These "Opal Pineapples" are found only in the Cretaceous sediments of the White Cliffs in Australia

White Cliffs is the only place where these marvelous (and very rare) pseudomorphic “pineapple” opals have been found. They were formed when a mineral crystal of glauberite (or ikalite) was first replaced by calcite and then opalised.

Formula: SiO2•nH2O
Colour: Colorless, white, various
Hardness: 51⁄2 - 61⁄2

A pseudomorph (which means false shape in Latin) is a mineral that has replaced another mineral's chemistry or structure with its own without changing the outward shape of the original mineral while color, hardness, and other properties change to those of the replacing mineral. Transformations from one mineral to another are not unusual in nature, but preserving the outward shape of the original mineral is! The end result is that the crystal appears to be one mineral but is actually another.

Opal "Pineapples" - an opal pseudomorph formed by the replacement of glauberite by opal - found only in New South Wales.


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fossil opals
fossil opals
sally Patel and natassa Patel have been in business for 35 years trueblueopal us family owned company Lightningopals llc is USA based sister branch of trueblueopals, we wholesale top opals from all opal fields , working with mining partner's like David Darby of yowah we specialize in investmentopals , and work with auction houses as well , sally has held several positions in opal association and is current treasurer we are members of ica and Agta and American opal society and Lrma other family members are also selling on opalauctions with over 20 stores catering from rough cut fossil beads specimens carvings and more
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  • insanemonkey42
    insanemonkey42
    ポジティブ

    As beautiful as it looks. A river of opal flowing between fossilized wood! Absolutely wonderful and it arrived quickly!

  • zafopalhunter143
    zafopalhunter143
    ポジティブ

    Paid and shipped - no feedback left after 100 days

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29th Nov 2024

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発送詳細

配送:
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発送元:
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概要

リストタイプ : Standard
製品番号 : 1498999
始まります : 16th November 2024 08:21 pm PST
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