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23.90cts Part of the Opalised Pineapple fossil FO-3348 Fossil opals

273 views
3 watching
Details
SKU
Fo-3348
Dimensions (mm)
19 x 15 x 15mm
Weight (cts)
23.9
Shape
Freeform
Type
Specimen, Rough
Colours
Description

FOSSIL OPALS -TRADING AS TRUEBLUEOPALS PTY - LIGHTNINGOPALS LLC


OPALISED FOSSIL PINEAPPLE

PURPLE MAUVE GREEN COLOUR

PART OF A LARGE PINEAPPLE

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 opalized.

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.


PICTURE TAKEN WET TO SHOW HOW THE OPAL WILL LOOK AFTER FINAL POLISH

THESE COLORS ARE NATURAL
NOT TREATED OR ENHANCED IN ANY WAY When opal arrives and you are not 100% happy you can return for refund, but if you alter or cut the rough it is yours and we cannot exchange However, if you touch any piece you are accepting ownership and Negative or neutral feedback cannot be left Please study carefully before cutting. Images of the rough opals are taking with water.

As with all our rough you may return it for a full refund provided it is NOT rubbed or touched in any way-we suggest you look at it dry with a loop before cutting.

However you are dealing with nature so some stones will come out BETTER OR WORSE

YOU ARE BUYING THE EXPERIENCE
IF ONLY A BEGINNER BUY POTCH AND COLOUR FIRST OR PREFORMED RUBS

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23.90cts Part of the Opalised Pineapple fossil FO-3348 Fossil opals
Qld, Australia
Owned by fossil opals
Recent Feedback
  • altemagic
    altemagic
    Positive

    Thank you for the interesting item!

  • altemagic
    altemagic
    Positive

    Thank you for the interesting item!

  • guest379897
    guest379897
    Positive

    Paid and shipped - no feedback left after 100 days

  • guest379897
    guest379897
    Positive

    Paid and shipped - no feedback left after 100 days

  • ntasky87
    ntasky87
    Positive

    Love this little fossil! The colours really pop and is so much better in person!! Thank you.

Audit

The Opal Sheriff program allows our members to request an audit on any product, which is completed by an independent Gemologist who assesses the accuracy of the item description and pictures.

Shipping Details

Costs:
Transit:
21 days via Standard Shipping - Tracked
Ships from:
Australia

Payment Options

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Overview

Listing Type : Standard
Product ID : 1672121
Starts : 9th February 2026 04:39 pm PST
* All prices are in USD

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