Gemological Information for Zircon

Color: Colorless, Blue, Yellow, Orange, Brown, Violet & Red
Crystal Structure Tetragonal - 4 sided prisms with pyramidal terminals
Refractive Index: high stones = 1.777 - 1.987
Durability: Fair to good, this decreases with heat treatment
Hardness: 6.5 to 7.5
Similar Stones: Spessartite, Sphene, Andradite, Sphalerite, Topaz, Tourmaline, Synthetic Rutile, Diamond & Strontiium Titanate
Treatments: Heat Treatment to change color
Country of Origin: Sri Lanka, Myanmar, Cambodia, Thailand & Australia

Zircon Care

Ultrasonic Cleaning: Not safe
Steam Cleaning: Not safe
Warm Soapy Water: Safe
Chemical Attack: Avoid
Light Sensitivity: Heat treated stones may return to their original color
Heat Sensitivity: May change color