Categoría: Other
Created by: mbourgaize
Número de Blosarios: 6
English (EN)
Red variety of the mineral Corundum, which is composed of aluminium oxide. The red colour is caused mainly by chromium and titanium. It is natural for rubies to have imperfections, including colour ...
It is the gem variety of the mineral olivine. The origin of its name is either the Arabic word "faridat" meaning "gem" or the French word "peritot" meaning "unclear". Peridot is one of the few ...
A type of quartz. Its name originates from the Sanskrit word "upala" meaning precious stone. They are luminous and iridescent with inclusions of many colours. Opals show a shifting of spectral ...
Onyx refers to a black and white banded variety of agate. Brown varieties are named sardonyx. It is composed of relatively straight, parallel layers of different colours. It is usually cut into ...
Opaque to translucent precious gemstone composed mainly of lazurite and calcite. Its name originates from the Persian word "lazhward", which was the name of a place in modern Turkestan known for its ...
The term "jade" refers to two different, yet similar semi-precious metamorphic mineral gemstones, Jadeite and Nephrite. Nephrite and jadeite are resistance to breakage and chipping and, due to their ...
Garnets are nesosilicates. Its name originates from ancient Greek as the colour resembled pomegranate seed or granatum. Garnets do not show the tendency of crystalline materials to split along ...
By: mbourgaize