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Click on the letter to find descriptions and pictures of Rocks, gems, and minerals
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
OCEAN JASPER
This new rock has been found along the northwest coast of Madagascar. The deposit formed similar to a rhyolite flow but has been totally resilicated. The rhyolitic spheres or orbs come in an astonishing array of colors and color combinations. The background can be white, teal, green, orange, pink, red or yellow. Botryoidal formations in white and deep green druzy are also common. The deposit, being located at the edge of the ocean, can only be seen and collected from at low tide. This remote area has no roads so the material must be transported to civilization by boat.
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Ocean Jasper | |
Chemical Composition SiO2 | |
Mohs 6 1/2 - 7 | |
Refractive Index 1.53-1.54 | |
Specific Gravity 2.58 - 2.64 | |
Cleavage None | |
Streak White | |
Localities Northwest coast of Madagascar. | |
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