Created by German mineralogist Friedrich Mohs in 1812, the Mohs scale of hardness serves as a vital tool for mineral identification. Comprising 10 distinct minerals ranging from the softest (talc) to the hardest (diamond), this scale proves particularly valuable in jewellery making by helping...
Amethyst stands proudly among the world's most precious gems, sharing its noble heritage with diamonds, emeralds, rubies and sapphires in the Cardinal Gems collection. This majestic purple crystal adorned royal crowns and ceremonial pieces until the 19th century, before South American mines revealed...