Topaz is an aluminium silicate containing fluorine and hydroxyl. Purely, it is colourless (white) ; it is the impurities which cause the variations of colour. […]
Tanzanite is a variety of Zoisite (calcium aluminum silicate ) and has a colour varying from blue to violet. This stone is Heat treatments enhance […]
Turquoise is a hydrated copper and aluminium phosphate. The colour varies from blue to blue-green. Turquoise is often mottled with cream or brown veins. Furthermore, […]
The Amazonite (also named Microcline) is a variety of potassium feldspar (like moonstone). The name “Amazonite” comes from the Amazon River in Brazil. The colour […]