Ocean Jasper
Quartz (chalcedony var. Jasper) · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal (microcrystalline/cryptocrystalline); massive/rock-forming habit with orbicular structures
Mineral Group
Silicates (Tectosilicate)
Chemical Formula
SiO2 (Silicon Dioxide) with impurities of iron oxides and chlorite
Formation Process
Hydrothermal; silica-rich fluids precipitated in volcanic cavities (rhyolite), forming spherulitic aggregates (orbs)
About This Crystal
An opaque stone displaying a diverse palette of earthy oranges, ochre, and deep teal-greens. It features a unique orbicular pattern consisting of circular 'poppy' or 'eye' shapes and mottled spots. The luster is vitreous to waxy when polished.
Physical Characteristics
Color: Multicolored (orange, green, pink, cream); Streak: White; Cleavage: None; Fracture: Conchoidal; Specific Gravity: 2.6 – 2.9; Fluorescence: Generally inert, occasionally weak under LWUV in white areas.
Optical Properties
Refractive index: 1.544 – 1.553; Double refraction (dr); Opaque to translucent on thin edges; No pleochroism due to microcrystalline structure.
Hardness & Durability
Origin Region
Marovato, Northwestern Madagascar (exclusive source); found along the coast in intertidal zones
Hardness & Durability
Mohs hardness: 6.5 – 7; High toughness due to interlocking micro-structure; excellent for daily jewelry wear.
Care & Maintenance
Safe to clean with warm soapy water and soft brushes; avoid ultrasonic cleaners if the stone has surface-reaching fractures. Avoid harsh acids.
Rarity & Value
Uncommon; the original veins in Madagascar are largely depleted, increasing the value of high-quality orbicular specimens. Typically affordable but prices vary by pattern clarity.
Special Characteristics
Orbicular (spherulitic) growth patterns; can contain tiny druzy quartz pockets or translucent 'agate' windows between the opaque orbs.
Lore & History
Historically discovered in the early 20th century but lost until 1999; traditionally associated with the solar plexus and heart chakras; symbolized as a stone of joy, renewal, and emotional release in modern lore.