Navratan - Nine Gemstones

Gemology is the science of those minerals and other materials which posses sufficient beauty and durability to make them desirable as gemstones. It is concerned with the identification, grading, evaluation, fashioning, and other aspects of gemstones. In this project I personally learned about varied gemstones, diamonds and gem minerals which are of great importance in jewellery trade and industry. 

 NINE GEMSTONES

 

 Diamond: It is the most precious and rare, gemstone. Most attractive to the eye, the diamond is famous for its play of colours: It is the most hardest gemstone. A fine diamond is radiant & delightful. It has a self luminous quality of a clear crystal. 

Diamond is a gemstone for the planet "Venus". 

Emerald: This gemstone is rare because it is very difficult to find a flawless emerald. Aquamarine, morganite goshenite & heliodor are also members of the beryl family (Emerald is a member of beryl family) and have same chemical constituents, except from chromic oxide which gives emerald green colour.

Emerald is a gemstone for planet "Mercury". 

Ruby : The ruby is found in a variety of crimson and scarlet red colours ranging from pink to a deep ruddy violet colour. The gemstone is solid and possesses high specific gravity. The red tint in ruby comes from a light combination of iron and chromuim. The finest quality ruby has a delicate rose colour. 

Ruby is a gemstone for the planet "Sun". 

Yellow Sapphire : Yellow sapphire is found in yellow, golden and orange colours as well as in a colourless variety known as white sapphire. The best gem is said to be of lemon-yellow colour. The colour in yellow sapphire is due to the presence of iron and titanium. 

Yellow Sapphire is a gemstone for the planet "Jupiter". 

Blue Sapphire : Some times blue Sapphire, rubies and white sapphires are found in the same mine and that is why there is a mixture of colours in the crystals of these gems. Except red all other colour are consider as Sapphire. Blue Sapphire Crystals are also found as twelve sided prisms. 

Blue Sapphire is a gemstone for the planet "Saturn".

Chrysoberyl Cat's Eye : Cat's eye is an aluminate of beryllium having araces of oxide of iron and chromium which serve as colouring agents and give it brownish and greenish tinges. The chrysoberyl mineral produces three types of gems : a. Alexandrite b. Cat's eye c. Chrysolite It contain a chatoyancy effect in which a light ray move in a particular direction. 

Chrysoberyl cat's eye is a gemstone for the planet "Ketu". 

Hessonite Garnet (Gomed) : A good quality gomed gemstone is one that reflects the colour of the urine of a cow. That is, having a nice honey colour. It is a silicate of zirconium and is commonly found in igneous rocks but is fairly rare as a gemstone. It also comes in blue, green & white colour.

Hessonite Garnet is a gemstone for the planet "Rahu". 

Coral: Coral is an organic gemstone which is obtain from the sea. The finest quality is obtained in bulk form the coasts of Algeria and Tunisia. It is very smooth and silky. It also comes in deep red, white, black and orange colours. But the "Angel Skin" or pink is the most rare and fine colour.

Coral is a gemstone for the planet "Mars".

Pearl : Pearl is also an organic gemstone which is obtain from the sea. The formation of a pearl inside a pearl oyster is thought to occur because of the presence of foreign material inside the body of the oyster. To save itself from the undesired material the mollusk coats the object with layer offer layer of nacre. It takes many years for a mollusk to produce a pearl of substantial size. The finest pearl is that which has no foreign matter in its core. 

Pearl is a gemstone for the planet "Moon".