Diamonds have been known in India for at least 3,000 years but most likely 6,000 years.
Special gemological techniques have been developed to distinguish natural diamonds, synthetic diamonds, and diamond simulants.Through studies of carbon isotope ratios (similar to the methodology used in carbon dating, except with the stable isotopes C-12 and C-13), it has been shown that the carbon found in diamonds comes from both inorganic and organic sources.Some diamonds, known as harzburgitic, are formed from inorganic carbon originally found deep in the Earth's mantle.Four characteristics, known informally as the four Cs, are now commonly used as the basic descriptors of diamonds: these are carat (its weight), cut (quality of the cut is graded according to proportions, symmetry and polish), color (how close to white or colorless; for fancy diamonds how intense is its hue), and clarity (how free is it from inclusions). The formation of natural diamond requires very specific conditions—exposure of carbon-bearing materials to high pressure, ranging approximately between 45 and 60 kilobars (4.5 and 6 GPa), but at a comparatively low temperature range between approximately 900 and 1,300 °C (1,650 and 2,370 °F).These conditions are met in two places on Earth; in the lithospheric mantle below relatively stable continental plates, and at the site of a meteorite strike. ....a must read for anyone serious about the [lack of] scientific evidence regarding evolution. Evolution: ' It is the world that has been pulled over your eyes to blind you from the truth.' Take the red pill, read this book, and discover the real world." This site was completed after having grown weary of false evolutionary doctrine promoted by public television, national networks and other media, and taught in our public schools.