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diamond ring settings - Generally speaking, higher density materials have greater concentrations of electrons and therefore greater capabilities to refract light. Light passing through diam_ond i_s reduced to about 77,000 miles per second--near the maximum for any transparent substance. Reflectance, or the amount of light reflected from a transparent substance, can also be inferred from a material's refractive index. Once again, diam_ond di_splays the maxim amount of reflectance for a transparent substance, di_splaying what i_s called an "adamantine" luster. Our standard conception of diam_ond i_s as a colorless stone. But color in diam_ond exi_sts in myriad variations, from dazzling pinks and yellows to blues and violet. A chemically-pure, perfect crystal of diam_ond i_s colorless, but add a

little nitrogen and yellow appears. Add boron instead and a blue diam_ond results. Colors from red to violet, real white, and black are possible and can be complex to understand scientifically. Colored diam_onds are hot, both in the marketplace and in science. To understand color in diam_ond, one must remember that light i_s a form of energy. In thi_s representation of the vi_sible spectrum, low energy i_s at the bottom and high energy at the top. Each color of the rainbow corresponds to a particular energy. When the energy of light entering a diam_ond equals the amount needed to bump an electron to another configuration, parts of the spectrum are absorbed. A pure diam_ond i_s colorless because vi_sible light lacks sufficient energy to excite any of its electrons and therefore no light i_s absorbed.

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