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40 CTS OPAL FOSSIL PINEAPPLE- GLAUBERITE /// FO-694-FOSSIL OPALS
- SKU
- FO-694
- Afmetingen (mm)
- 35.000 x 29.000 x 16.000mm
- Gewicht (cts)
- 40.000
- Shape
- Freeform
- Type
- Specimen
- Kleuren
-
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.
- SKU
- FO-694
- Afmetingen (mm)
- 35.000 x 29.000 x 16.000 mm
- Gewicht (cts)
- 40.000
- Shape
- Freeform
- Type
- Specimen
- Kleuren
-
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.
| Verzend provider | Verzending naar:land | Verzending naar de rest van de wereld |
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| Standard Shipping - Tracked | $20.00 / :dagen dagen | $25.00 / :dagen dagen |
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:land
Standard Shipping - Tracked wordt verdisconteerd tot $20.00 bij bestellingen met 2 of meer artikelen
Rest van de wereld
Standard Shipping - Tracked wordt verdisconteerd tot $25.00 bij bestellingen met 2 of meer artikelen
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| FedEx | $35.00 / :dagen dagen | $39.00 / :dagen dagen |
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:land
FedEx wordt verdisconteerd tot $35.00 bij bestellingen met 2 of meer artikelen
Rest van de wereld
FedEx wordt verdisconteerd tot $39.00 bij bestellingen met 2 of meer artikelen
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| DHL | $25.00 / :dagen dagen | $29.00 / :dagen dagen |
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:land
DHL wordt verdisconteerd tot $20.00 bij bestellingen met 2 of meer artikelen
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PositiefAs beautiful as it looks. A river of opal flowing between fossilized wood! Absolutely wonderful and it arrived quickly!
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Positief
Paid and shipped - no feedback left after 100 days
