Lapis Lazuli is a blue, greenish blue or purple blue rock with complex mixture of

Gem-quality kyanite crystals are pale to deep blue, or white, grey, or green. Colour distribution

Nephrite, recognized as a separate type of jade since 1863, is found as aggregates of

For centuries jade was thought to be a single gemstone, but in 1863 two types

Jade refers to two distinct mineral species Jadeite and Nephrite. Due to their almost similar

Iolite (Indian: Kakaneeli; Italian: Iolite) is a blue to purplish-blue color, transparent to opaque stone

Idocrase was first discovered on the Italian volcano, Vesuvius, as small, perfect crystals. Also called

Howlite is a soft, light gemstone with a chalky white color, commonly with black or

Hematite usually occurs as massive, opaque material withg a metallic lustre, showing a blood-red colour

Several varieties of gypsum are used as decorative stones. The most  important, alabaster, is found

The attractive, bright green color of uvarovite is due to the presence of chromium. The

Gem-quality spessartite (also known as spessartine) is uncommon. It is bright orange when pure, but

Hessonite Garnet: It occur in a very wide range of colors, from colorless right through

Garnets containing titanium and manganese are grouped as andradite garnet. The most valuable is demantoid,