|Dimensions (mm)||20 x 13 x 11mm|
|Weight (carats)||17.65 carats|
FOSSIL OPALS -TRADING AS TRUEBLUEOPALS PTY - LIGHTNINGOPALS LLC
OPALISED FOSSIL 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.
Colour : Colorless, white, various
Hardness: 5½ - 6½
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
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 WORSEYOU ARE BUYING THE EXPERIENCE
The Opal Sheriff program allows our members to request an audit on any auction, which is completed by an independent Gemologist who assesses the accuracy of the item description and pictures.
|Starts||1st Feb 2021 5:17pm PST|
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