Opals
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55 CTS OPAL PINEAPPLE GLAUBERITE -IKALITE /// FO-691 Fossil opals
- 存貨單位
- FO-691
- 尺寸（毫米）
- 42.000 x 35.000 x 24.000mm
- 重量 (cts)
- 55.000
- Shape
- Freeform
- 類型
- Specimen
- 顏色
-
OPALISED PINEAPPLE
GREEN 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.
- 存貨單位
- FO-691
- 尺寸（毫米）
- 42.000 x 35.000 x 24.000 mm
- 重量 (cts)
- 55.000
- Shape
- Freeform
- 類型
- Specimen
- 顏色
-
OPALISED PINEAPPLE
GREEN 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.
| 運輸商 | 運送至：國家 | 運送到世界其他地區 |
|---|---|---|
| Standard Shipping - Tracked | $20.00 / ：幾天天 | $25.00 / ：幾天天 |
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：國家
Standard Shipping - Tracked 對包含 2 或更多商品的訂單折扣為 $20.00
世界其他地區
Standard Shipping - Tracked 對包含 2 或更多商品的訂單折扣為 $25.00
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| FedEx | $35.00 / ：幾天天 | $39.00 / ：幾天天 |
|
：國家
FedEx 對包含 2 或更多商品的訂單折扣為 $35.00
世界其他地區
FedEx 對包含 2 或更多商品的訂單折扣為 $39.00
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| DHL | $25.00 / ：幾天天 | $29.00 / ：幾天天 |
|
：國家
DHL 對包含 2 或更多商品的訂單折扣為 $20.00
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積極的As beautiful as it looks. A river of opal flowing between fossilized wood! Absolutely wonderful and it arrived quickly!
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積極的
Paid and shipped - no feedback left after 100 days
