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about gemstones
Christie’s and Sotheby’s, auction houses specialising in the sale of precious stones and jewellery with precious stones, announced…
Chrysoprase belongs to the chalcedony group, so it is a cryptocrystalline (hidden crystalline) form of quartz. The term…
We have received information that mining at the Wingertsberg (Steinbruch) quarry near the town of Nieder Mendig, Laacher…
Cleaning and restoration of old jewellery with Czech garnet or how to save a garnet jewel. First of…
Even in the summer we did not slack off and tried to prepare something interesting for our clients….
Recently, “synthetic wolfavins” have been recorded in places where gemstones and minerals are not commonly traded. Synthetic woolavine…
