記者発表の検索結果
Amethystine Chalcedony
Winter 2011 G&G Lab Notes
Unique Star Sapphire with Transparent Core
Imitation Rubellite Boulders
Gemstone Enhancements and Detection in the 1990s
Untitled
What’s Next? | Gems & Gemology
A look ahead to the future of geographic origin determination.
Large Namibian Demantoid Garnet
Natural Blue and Black Diamonds, a Byzantine Garnet Intaglio, Yogo Sapphires, and “Kasumiga Pearls”
Diamond Slices
The Gemological Properties of the De Beers Gem-Quality Synthetic Diamonds
