mineral
Jadeite and Assorted Corundum (Ruby/Sapphire) / Beryl (Emerald)
Jadeite (NaAlSi2O6), Ruby/Sapphire (Al2O3), Emerald (Be3Al2(SiO3)6)
Hardness: Jadeite 6.5-7, Corundum 9, Emerald 7.5-8. Colors: Green, Red, Blue. Luster: Vitreous to greasy. Crystal Structure: Monoclinic (Jade) and Hexagonal/Trigonal (Gemstones).
- Hardness
- Jadeite 6
- Luster
- Vitreous to greasy
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Physical properties
Hardness: Jadeite 6.5-7, Corundum 9, Emerald 7.5-8. Colors: Green, Red, Blue. Luster: Vitreous to greasy. Crystal Structure: Monoclinic (Jade) and Hexagonal/Trigonal (Gemstones).
Formation & geological history
Jadeite forms in metamorphic rocks under high pressure and low temperature conditions. Corundum (Ruby/Sapphire) and Emerald (Beryl) form in igneous pegmatites or metamorphic skarns through hydrothermal processes.
Uses & applications
Primary use is in high-end jewelry and ornamental carving. They have significant value in the gemstone market and as collector specimens.
Geological facts
Jadeite is the most precious form of jade, highly prized in Asian cultures. Rubies and Sapphires are varieties of the same mineral, corundum, distinguished only by color.
Field identification & locations
Identify by specific gravity and refractive index using gemological tools. Found in Myanmar (Jade), Sri Lanka, Madagascar, and Colombia (Emerald). Look for color saturation and internal inclusions in the field.
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metamorphic
Gypsum (variety Selenite or Alabaster)
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Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
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