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CORALAX
Article Id - AGG0000094
 
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Nature of Material: Gilson imitation coral is a man-made imitation; chemical composition consists of calcite, silica, and probably some iron oxide
Appearance: semi translucent to opaque red, pink
Phenomena: none
 
VARIETY AND TRADE NAMES
Misnomers:
synthetic coral
Typical Size Range: large pieces are available
Typical Cutting Styles: cabochons, beads, carvings
 
 
 
IDENTIFICATION
Optic Character: AGG, opaque
Refractive Index: 1.55 spot reading
Birefringence: weak effect sometimes detectable on spot reading
Specific Gravity: usually about 2.44
Polish Luster: sub-vitreous
Fracture: granular
Luster: dull
Cleavage: none

Identifying Characteristics:
Lacks the structure lines of natural coral; fine granular texture under high magnification.

Method of Manufacture:
uncertain, probably a ceramic technique
Hardness: 3 to 4
Toughness: good

Market
Availability: limited
Public Recognition: unfamiliar
Recommended Disclosures: Inform customers it is a man-made imitation. Avoid rough handling, heat, and chemicals.
 
 
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