Gems : their sources, descriptions and identification
Michael O'Donoghue (Editor)
"Gems offers a descriptive account of all gem materials used as ornament, along with their synthetic counterparts and the materials used over the centuries to imitate them. This information is particularly relevant at a time when synthetic diamonds are circulating."--Jacket
Print Book, English, 2006
Sixth edition
Butterworth-Heinemann, Oxford, 2006