• Comment: Already mentioned as a variety in the short start-class article orbicular jasper. Sam Sailor 07:01, 31 October 2024 (UTC)

Polished Ocean Jasper at the National Museum of Natural History, France

Ocean Jasper is a trademarked name for a variety of orbicular jasper found along the northeast coast of Madagascar. It is composed of highly silicified microcrystalline chalcedony with spherulite inclusions.[1] [2]

History

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The existence of chalcedony deposits in the mining area were first referenced in by Alfred Lacroix in 1922, although the exact location remained unknown.[3] Paul Obeniche, owner of Gem Shop, rediscovered Ocean Jasper in 1999. It was made commercially available at the Tucson Gem & Mineral Show in January 2000. Enter the Earth has managed the mines since 2013, and later acquired the trademark in 2022. Eight veins of Ocean Jasper have been discovered thus far.[4] [5]

References

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  1. ^ Werner Lieber, Heidelberg (September 2003). Sphärolithischer Chalcedon von Madagaskar (in German). Vol. 28. Lapis. p. 18-22.
  2. ^ Lomatch, Susan (19 February 2020). "Characterization Studies of Ocean Jasper". Retrieved 30 October 2024.
  3. ^ Lacroix, Alfred (1922). Minéralogie de Madagascar (in French). Librairie maritime et coloniale.
  4. ^ Matthews, Christopher. "An Introduction to Ocean Jasper". Retrieved 30 October 2024.
  5. ^ Lomatch, Susan (31 October 2019). Ocean Jasper: A Natural Wonder and a Geological Mystery. ISBN 1703393511.
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