History of Garnet Mining and Cutting in the Austro-Hungarian Monarchy
Karl Schmetzer
Gems in Greece: Geology, mineralogy and crystallizing environment
In the accretionary Hellenides Orogen, gems occur in various rock types of mainly four tectonometamo
Padparadscha Sapphire & heat treatment
In 2018 the Padparadscha engagement ring of Princess Eugenie (Figure 1), the niece of the king, gave
