Mineral species: Jadeite
Mineral group: Pyroxene group
Chemical formula: Sodium aluminum silicate (NaAlSi2O6)
Mohs hardness: 6.75
Crystal system: Monoclinic
Lustre: vitreous to greasy
Transparency: translucent to opaque
Streak: White
Cleavage: Generally obscured by aggregate texture
Fracture: Splintery to uneven
Specific gravity: 2.90-3.38 (species-dependent)
Refractive index: 1.60-1.68 (species-dependent)
Optical phenomena: None commonly reported
Colour range: Green, White
Common inclusions: Fibrous/granular textures, black mineral spots, and healed fractures
Geological environment: Jadeite occurs in High-pressure metamorphic terrains and serpentinized ultramafic environments. Its Monoclinic structure reflects the pressure-temperature conditions of those host rocks, with notable occurrences in Myanmar (Hpakan), Guatemala (Motagua Valley), Japan, Kazakhstan.
Principal mining regions: Myanmar (Hpakan), Guatemala (Motagua Valley), Japan, Kazakhstan
Important commercial sources: Myanmar is the dominant commercial source of gem-quality jadeite; Guatemala is the key secondary source
Historical significance: Jade has exceptional cultural significance across East Asian and Mesoamerican traditions.
Common treatments: Bleaching, polymer impregnation, and dyeing are established trade treatments and require disclosure.
Synthetic or imitation forms: Dyed quartzite, serpentine, glass, and composite imitations are common.
Common look-alikes: topaz, moonstone, peridot
Jewellery uses: Jadeite is used chiefly for A good fit for collectors and jewellers looking for visible character without needing the highest hardness category.. In the trade it is commonly fashioned as faceted stones, calibrated cuts, and higher-clarity collector pieces, with Mohs hardness 6.75 guiding suitable jewellery applications.
Care recommendations: Jadeite should be cleaned with lukewarm water, mild soap, and a soft brush. At Mohs 6.75 in the Monoclinic system, avoid steam cleaners, harsh chemicals, and high-impact wear. Protect cleavage directions from sharp knocks during wear and setting.