Opal Replacement Of Clam Fossil
Unknown Owner
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This sparkling, iridescent fossil shell (a pelecypod) is 4.5 cm tall and is translucent when backlit, with a colorful surface opalization showing the play of colors. 15 grams in mass. It is exceptional for these fossil shells in its size and surface coverage. And, it shows excellent 3-dimensional shape and preservation of the original shell. It is lightly polished on both sides. These very rare opal-replaced fossil shells were formed 135 million years ago and are unique to Australia. The supply at this famous locality, where the town of Coober Pedy is actually dug into the formation, has been exhausted as mining here is no longer profitable or commercially successful on any scale. These gem-quality specimens hold considerable value simply as opal for carving purposes and represent some of the cream of the crop assembled by a local collector during the 1960s-1980s mostly. Specimens of this quality are simply unavailable on the market. We are honored to present this private collection for the first time.
Product details
SpeciesOpal
SizeMiniature
Dimensions4.5 x 2.2 x 1.4 cm
Added on10/23/2024
LocalityAustralia, South Australia
Known provenance
| Date | Collector | Acquisition price |
|---|---|---|
| 08/2024 | Unknown Owner | Not disclosed |
| — | The Arkenstone | Not disclosed |
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Mineral guide
Learn about Opal
amorphous silica with water and a spectacular play-of-color; black, boulder, and fire opal varieties capture brightness, color, and collecting appeal.Regional guide
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