Opal Carat Weight Calculator
Calculate opal carat weight and value. Professional tool for opal weight estimation.
Opal Weight & Value Calculator
Specialized calculator for opal gemstones (SG: 2.15)
Enter gemstone dimensions and click calculate to see results
About Opal Gemstones
Opals are unique gemstones known for their play-of-color phenomenon. With a specific gravity of 2.15, opals are among the lightest gemstones. They contain water and require special care. October's birthstone comes in many varieties.
Opal Value Factors:
- Play of Color: Vibrant, multi-color flashes are most valuable
- Body Tone: Black opals command the highest prices
- Pattern: Harlequin and ribbon patterns are prized
- Origin: Australian opals (especially Lightning Ridge) are top-tier
- Type: Precious opal vs common opal affects value significantly
Our opal calculator helps you estimate the carat weight and approximate price range for your opal gemstones based on their dimensions.