Crown of Saint Wenceslas
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The crown of Saint Wenceslas is a crown forming part of the Bohemian crown jewels, made in 1346. Charles IV, king of Bohemia and Holy Roman Emperor, had it made for his coronation, dedicating it to th
Replica of the crown in the Old Royal Palace of Prague Castle
Emerald
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Emerald is a gemstone and a variety of the mineral beryl colored green by trace amounts of chromium or sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale. Most emeralds have many incl
Emerald crystal from Muzo, Colombia
Main emerald producing countries
Cut emeralds
Brazilian emerald (grass-green variety of the mineral beryl) in a quartz-pegmatite matrix with typical hexagonal, prismatic crystals