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4 mm Round Precision-cut AAA Ceylon Color Blue Sapphire, Item #ACC222198

Genuine Sapphire

$520.00

4 mm Round Precision-cut AAA Ceylon Color Blue Sapphire, Item #ACC222198

SKU c97812ce0968 Category

Description

4 mm Round Precision-cut AAA Ceylon Color Blue Sapphire.

Specifications

Weight:0.28 CT
Selling Unit of Measure:ea
Gemstone Quality:AAA
Gemstone Quality Description:Medium to dark blue; little or no color zoning; eye clean; excellent brilliance; excellent cut; excellent polish
Stone Enhancement Code:H
Stone Hardness:9
Gem Species:Corundum
Stone RI:1.762-1.77
Stone Specific Gravity:4.00
Stone Optic Character:DR
Stone Phenomena:Asterism, Color Change, Chatoyancy (very rare)
Stone Ultrasonic Reaction:Usually safe
Steamer Reaction:Usually safe
Heat Reaction:Poor-may sometimes improve color, but may cause loss of color
Chemical Reaction:Solutions containing Borax
Major Sources:Australia, Cambodia, East Africa, India, Kashmir, Myanmar, Sri Lanka, Thailand, United States