Jade

Jade is an umbrella term for two different types of decorative rocks used for jewelry or ornaments. Jade is often referred to by either of two different silicate mineral... Wikipedia

• Category:  Mineral
• Crystal system:  Monoclinic
• Color:  Virtually all colors, mostly green
• Crystal habit:  Intergrown grainy or fine fibrous aggregate
• Cleavage:  None
• Fracture:  Splintery
• Tenacity:  Brittle
• Mohs scale hardness:  6–7
• Diaphaneity:  Translucent, opaque
• Specific gravity:  2.9–3.38
• Refractive index:  1.600–1.688
• Birefringence:  0.020–0.027
• Pleochroism:  Absent
• Dispersion:  None
• Data source:  DuckDuckGo