Ocean Jasper
Quartz var. Chalcedony · Decorative Stone and Semi-Precious Gemstone
Crystal System
Trigonal, microcrystalline aggregate habit forming massive structures
Mineral Group
Silicates, specifically Tectosilicates
Chemical Formula
SiO2
Formation Process
Hydrothermal and volcanic processes, where silica-rich fluids fill cavities in rhyolitic lava flows and crystallize into spherulitic chalcedony
About This Crystal
An opaque, multicolored specimen featuring a distinctive orbicular pattern consisting of circular eyes, dots, and swirling multicolored patches of red, green, brown, yellow, and white against an earthy matrix, with a smooth polished surface and waxy luster
Physical Characteristics
Colors include red, green, brown, cream, and yellow; white streak; no cleavage; conchoidal fracture; specific gravity around 2.60 to 2.65; brittle tenacity; opaque to translucent
Optical Properties
Singly or doubly refractive microcrystalline aggregate, refractive index typically around 1.54 to 1.55, no notable pleochroism or major optical phenomena other than complex orbicular patterns
Hardness & Durability
Origin Region
Northwestern Madagascar, specifically along the coast of the Analalava region, formed in volcanic rock
Hardness & Durability
Mohs hardness of 6.5 to 7, good toughness making it durable and well-suited for cabochons, carvings, and various types of jewelry wear
Care & Maintenance
Easy to maintain; clean with warm soapy water and a soft brush; avoid harsh acids or prolonged exposure to extreme heat; no special sunlight fading precautions needed
Rarity & Value
Uncommon to Rare due to the specific, remote locality in Madagascar where certain veins are now underwater or depleted; valued based on pattern complexity, color vibrancy, and lack of fractures; prices range from affordable tumbled stones to high collector pieces
Special Characteristics
Notable for its striking orbicular 'eyes' and multi-colored spherulitic growth structures formed by radial crystal aggregates within the chalcedony matrix
Lore & History
A relatively modern discovery from the late 20th century, Ocean Jasper has no ancient historical lore but is widely used in modern crystal healing practices as a stone of relaxation, optimism, and emotional uplifting, often associated with the heart and solar plexus chakras