6.87 ct very large unique natural opal gemstone

Product No: 1704opa0003
Stone Type: Natural Opal
Shape: Pear
Total weight: 6.87 carats
Size (mm): 18.1x13.2x4.3mm
Color: Rainbow See Image
Clarity: Semi Transparent
Luster: Very Good
Hardness: 5.5-6
Treatment: Heat
Origin: Australia