Jewellery Bibliography
100 YEARS OF PASSION FOR GROSSE & BIJOUX CHRISTIAN DIOR, Vivienne Becker (et al.), 2010. 500 BRACELETS, Marthe LeVan, 2005. 500 EARRINGS, Marthe LeVan, 2007. … Read more
Opal Identification
GEMMOLOGICAL LABORATORY FACT SHEET Chemical composition of Opal: Si0 2nH 20 – Hydrated Silica. • Water content in Precious Opal 3-10%. • Water content … Read more