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Ocean Jasper Cabochons from Madagascar

Ocean Jasper Orbs Close-up Jasper is silicon dioxide, a gemstone variety of the tectosilicate mineral quartz in the trigonal crystal system. Jasper is a variety of chalcedony or chert, quartz with a microcrystalline texture so fine that its crystalline nature is too small to see clearly even under strong magnification.

"Ocean Jasper" is a trade name for a variety of orbicular jasper found on the Ambolobozo Peninsula in an intertidal zone along the northwest coast of Madagascar. Orbicular jaspers exhibit rhyolitic spheres or orbs that are typically formed in highly silicated rhyolite flows. In highly silicified rhyolite or tuff, quartz and feldspar can crystallize in radial aggregates which provide the seed for the orbicular structure exhibited in this variety of jasper. Ocean Jasper is characterized by spheres and orbs ranging through a striking range of colors and color combinations on backgrounds that are typically green, pink, red, white or yellow. The pockets and vugs of white and green quartz druzy common to Ocean Jasper can provide aesthetic opportunities for creative lapidaries.

Ocean Jasper is most commonly presented in jewelry as cabochons, beads and carvings. Jasper is a relatively tough and hard material (7 Mhos hardness) with good wear characteristics and resistance to abrasion. Jasper wears well in rings and bracelets and is commonly employed as a gemstone in all types of jewelry. Ocean Jasper does not have specific care requirements, but conservative gemstone precautions should be observed when cleaning and storing jasper for the sake of preserving the original condition of the stone. It is safest to clean jaspers using warm water, mild soap and a cloth or soft brush. Do not use an ultrasonic or steam cleaner and keep jaspers out of contact with excessive heat, acids, ammonia and other chemical or abrasive cleaners.


Cabochon18 - Ocean Jasper Cabochon - $29.95
 
Cabochon18 - Ocean Jasper Cabochon Locality: Madagascar
Approximate Size: 42.9mm long x 27.4mm wide x 6.1mm thick. Please note the image at left may be larger than life to help show the fine details.
Approximate Weight: 54.8 carats

Cabochon21 - Ocean Jasper Cabochon - $29.95
 
Cabochon21 - Ocean Jasper Cabochon Locality: Unknown
Approximate Size: 34.9mm long x 25.2mm wide x 6.4mm thick. Please note the image at left may be larger than life to help show the fine details.
Approximate Weight: 36.0 carats

Cabochon22 - Ocean Jasper Cabochon - $19.95
 
Cabochon22 - Ocean Jasper Cabochon Locality: Madagascar
Approximate Size: 37.2mm long x 19.1mm wide x 6.3mm thick. Please note the image at left may be larger than life to help show the fine details.
Approximate Weight: 35.8 carats

Cabochon23 - Ocean Jasper Cabochon - $34.95
 
Cabochon23 - Ocean Jasper Cabochon Locality: Madagascar
Approximate Size: 35.5mm long x 24.3mm wide x 6.1mm thick. Please note the image at left may be larger than life to help show the fine details.
Approximate Weight: 42.2 carats

Cabochon24 - Ocean Jasper Cabochon - $34.95
 
Cabochon24 - Ocean Jasper Cabochon Locality: Madagascar
Approximate Size: 37.3mm long x 21.2mm wide x 5.8mm thick. Please note the image at left may be larger than life to help show the fine details.
Approximate Weight: 34.2 carats

Cabochon26 - Ocean Jasper Cabochon - $24.95
 
Cabochon26 - Ocean Jasper Cabochon Locality: Madagascar
Approximate Size: 45.8mm long x 28.3mm wide x 6.9mm thick. Please note the image at left may be larger than life to help show the fine details.
Approximate Weight: 74.6 carats

Cabochon28 - Ocean Jasper Cabochon - $22.95
 
Cabochon28 - Ocean Jasper Cabochon Locality: Madagascar
Approximate Size: 25.7mm long x 19.7mm wide x 6.2mm thick. Please note the image at left may be larger than life to help show the fine details.
Approximate Weight: 22.2 carats

Cabochon31 - Ocean Jasper Cabochon - $32.95
 
Cabochon31 - Ocean Jasper Cabochon Locality: Madagascar
Approximate Size: 36.0mm long x 20.8mm wide x 5.7mm thick. Please note the image at left may be larger than life to help show the fine details.
Approximate Weight: 31.4 carats
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