gemstone
Precious Coral (Angel Skin Coral) with Jade
Calcium carbonate (CaCO3, mostly calcite) with Jadeite/Nephrite
AI-generated identification · may be incorrectHardness 3.5 (coral) and 6.0-7.0 (jade); vitreous to waxy luster; soft peach-pink and spinach-green colors; amorphous/microcrystalline.
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Physical properties
Hardness 3.5 (coral) and 6.0-7.0 (jade); vitreous to waxy luster; soft peach-pink and spinach-green colors; amorphous/microcrystalline.
Formation & geological history
Precious coral is an organic biomineral formed by marine polyp colonies in deep subtropical waters, paired with metamorphic jade formed under high pressure and low temperature.
Uses & applications
Extensively carved and set into fine jewelry, ornamental art, and collector cabochons.
Geological facts
Pink 'angel skin' coral is historically harvested from waters around Japan, Taiwan, and the Mediterranean, and has been treasured since antiquity.
Field identification & locations
Identified by delicate wood-grain-like growth structures under magnification and reaction to dilute acid (for coral), combined with tough, greasy-lustered carved jade.
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