Many gemstones are enhanced to improve color, clarity, or durability (e.g., heating, oiling, dyeing).
We only accept enhancements that improve beauty without masking durability or artificially increasing carat weight.
Diamonds sold are not enhanced except by cutting and polishing.
The guide provides a comprehensive understanding of listing gemstones, accepted enhancements, and specific care instructions (e.g., avoid ultrasonic cleaning for many stones, protect from chemicals and extreme temperatures.)
