Quartz is the ideal gemstone for jewellery and is one of the few coloured stones you’ll find in almost any jewellery shop. Quartz is a major component of granite and other igneous rocks. It is also common in sedimentary rocks and is a common component of metamorphic rocks. Well-formed crystals […]
Tag: ametista
Amethyst stone – characteristics, marketing and valuation
Considered the most striking of the quartz family, amethyst has always been coveted. Queen Catherine the Great was a great admirer of this gemstone. For a long time it was considered as precious as sapphires, diamonds and emeralds. Today, with the discovery of abundant deposits, it is no longer as […]








