Diamonds:. Types of Diamonds, Jewellery

The name diamond is derived from the ancient Greek. Diamonds are thought to have been first recognized and mined in India, where significant alluvial deposit of the stone could be found many centuries ago along the rivers Penner, Krishna and Godavari. Diamonds have been known in india for at least 3,000 years but most likely 6,000 years.




Diamond Color:.
Diamonds occur in a variety of color steel gray diamonds, white diamonds, blue diamonds, yellow diamonds, orange diamonds, red diamonds, green diamonds, pink diamonds, purple,brown diamonds and black diamonds. These colored interstitial impurities or structural defects that cause the coloration, whilst pure diamonds are perfectly transparent and colorless. Diamonds are scientifically classed into two main types and several subtypes, according to the nature of impurities present and how these impurities affect light absorption.

Grading White Diamonds:.
The majority of diamonds that are mined are in a range of pale yellow or brown color that is termend the normal color range. Diamonds that are of intense yellow or brown, or any other color are called fancy color diamonds. Diamonds that are of the very highest purity are totally colorless, and appear a bright white diamond. The degree to which diamonds exhibit body color is one of the four value factor by which diamonds are assessed.

Diamond Jewellery:.

Jewellery or jewelry is small decorative items worn for personal adormment such as brooches, rings, necklaces,earrings,and bracelets. Jewellery may be attached to the body or the clothes, and the term is restricted to durable ornaments, excluding flowers for example. For many centuries metal, often combined with gemstones, has been the normal material for jewellery, but other materials such as shells and other plant materials may be used. It is one of the oldest type of archaeological artefact. with 100,000 year oldest type of archaeological artefact  is knows as old beads made from Nassarius shells thought to be the oldest known jewellery.