Green Jade (Jadeite)
Jadeite (variety: Imperial or Apple Green Jade) · Precious Gemstone / Collector Mineral
Crystal System
Monoclinic; typically occurs in massive, microcrystalline, or granular habits rather than distinct crystals
Mineral Group
Silicates (Subgroup: Inosilicates, Pyroxene group)
Chemical Formula
NaAlSi2O6; Green color often caused by trace amounts of Chromium (Cr)
Formation Process
Metamorphic; specifically subduction zone metamorphism involving high-pressure fluids interacting with serpentinites.
About This Crystal
The specimen is a polished, translucent to semi-opaque green sphere (likely a bead). It exhibits an even, saturated 'apple green' color with a vitreous to greasy luster and a smooth, waxy surface texture.
Physical Characteristics
Color: Green; Streak: White; Cleavage: Two directions at nearly 90 degrees (rarely visible in microcrystalline mass); Fracture: Splintery to uneven; Specific Gravity: 3.25–3.35; Fluorescence: Usually inert but may show weak greenish or whitish glow under LWUV.
Optical Properties
Refractive Index: ~1.666; Birefringence: 0.012–0.020 (usually aggregate); Diaphaneity: Translucent; Optical Phenomena: Greasy surface sheen due to interlocking micro-fibers.
Hardness & Durability
Origin Region
Primary source is Myanmar (Burma); also found in Guatemala, Russia, and Japan. Formed in high-pressure, low-temperature metamorphic environments.
Hardness & Durability
Mohs Hardness: 6.5–7; Toughness: Exceptional (highest resistance to fracturing due to interlocking fibrous structure); Stability: Stable under most conditions.
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid ultrasonic cleaners and harsh chemicals. Store away from sharp objects to prevent surface scratches.
Rarity & Value
Varies by quality; highly translucent 'Imperial' green is extremely rare and valuable. Treatments like dyeing (Type C) or bleaching/polymer impregnation (Type B) are common.
Special Characteristics
Renowned for its extreme toughness; often exhibits a 'mottled' internal structure when viewed under strong light due to its granular crystalline nature.
Lore & History
Highly revered in Chinese culture as 'the stone of heaven,' symbolizing purity, longevity, and prosperity. Historically used for ceremonial objects and tools by the Olmec and Maya civilizations.