Ocean Jasper
Quartz var. Jasper (Spherulitic Chalcedony) · Semi-Precious Gemstone / Collector Mineral / Decorative Stone
Crystal System
Trigonal (Microcrystalline/Cryptocrystalline); typically found in massive habit with orbicular (spherulitic) structures.
Mineral Group
Silicates (Tectosilicate subgroup; member of the Quartz/Chalcedony family)
Chemical Formula
SiO2 (Silicon Dioxide) with impurities of Iron, Magnesium, and Manganese
Formation Process
Hydrothermal; silica-rich fluids precipitated in volcanic rock cavities, with spherulitic (orbicular) growth occurring around a central nucleus during cooling.
About This Crystal
A polished orbicular sphere featuring a dark forest-green base with distinctive 'orb' or 'eye' circular inclusions in shades of cream, white, and pale green. It exhibits an opaque body with a vitreous to waxy luster and smooth surface texture.
Physical Characteristics
Color: Dark green with cream orbs; Streak: White; Cleavage: None; Fracture: Conchoidal to uneven; Specific Gravity: 2.58–2.91; Tenacity: Brittle; Fluorescence: Generally inert, occasionally weak yellow in lighter patches.
Optical Properties
Refractive Index: 1.543–1.553; Birefringence: Up to 0.009 (usually not measurable in cryptocrystalline forms); Optical Character: Aggregat; Phenomenon: Orbicular/Spherulitic patterning.
Hardness & Durability
Origin Region
Madagascar (specifically the littoral zones of the Sofia region, Ambolobozo peninsula); forms in altered rhyolitic or volcanic tuffs.
Hardness & Durability
Mohs Hardness: 6.5 to 7. Excellent durability and toughness for jewelry and decorative use; resistant to most household scratches.
Care & Maintenance
Clean with warm soapy water and a soft brush; safe for most jewelry cleaners but avoid harsh acids. Store separately from specimens like Topaz or Sapphire that may scratch it.
Rarity & Value
Uncommon; the original deposits are largely depleted, making high-quality orbicular patterns increasingly valuable. Prices vary based on 'eye' definition and color contrast.
Special Characteristics
Displays 'orbicular' growth, where radial fibrous crystals of chalcedony or quartz form spherical structures; may contain small druzy quartz pockets or vugs.
Lore & History
Discovered/marketed in the late 20th century; culturally associated with the ocean and Madagascar's coastline. Metaphysically, it is traditionally believed to aid in emotional release, cellular memory healing, and connecting to the lunar and solar tides.