metamorphic
Jadeite (Jade)
Jadeite, NaAlSi₂O₆
Hardness: 6.5-7.0 Mohs; Color: Pale green with darker green mottling; Luster: Vitreous to greasy; Crystal Structure: Monoclinic; Specific Gravity: 3.25-3.43
- Hardness
- 6
- Color
- Pale green with darker green mottling
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6.5-7.0 Mohs; Color: Pale green with darker green mottling; Luster: Vitreous to greasy; Crystal Structure: Monoclinic; Specific Gravity: 3.25-3.43
Formation & geological history
Formed in high-pressure, low-temperature metamorphic environments, typically in subduction zones where oceanic plates meet continental plates.
Uses & applications
Predominantly used for ornamental purposes, fine jewelry such as the 'Bi' disk shown, and small sculptures or architectural accents.
Geological facts
Jade has been prized for over 5,000 years, particularly in Chinese culture where it symbolises purity and moral integrity. The donut shape seen here is known as a 'Bi' disk, historically used as a ritual object.
Field identification & locations
Identify by its exceptional toughness (resistance to fracture), cold feel to the touch, and distinct 'clink' sound when tapped. Found commonly in Myanmar (Burma), Guatemala, and Japan.
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