Clarissa Bancroft. Diamonds. August 16th , 2017.
Diamonds are undoubtedly a girl's best friends and till recently, this precious stone was not exposed to any kind of competition as far as its value, romantic implications, and importance in specific occasions are concerned. However, along came competition in the form of moissanite and its various gemological characteristics loomed large over the future of original diamonds. Before we embark upon uncovering the similarities and differences between these mineral based gemstones, let's get to know each of these contenders a little more closely. Before we proceed, let me disclose one interesting fact about moissanite - most of them that we get today are synthetic as they are artificially synthesized in laboratories, owing to the extreme rarity of its naturally occurring mother mineral.
The history of blood diamonds can be traced from the year 1989 when Liberia was under the influence of a civil war. Liberian president Charles G. Taylor was accused by the UN for supporting the RUF insurgency in Sierra Leone by providing training to insurgents and weapons in exchange for diamonds.
GIA does not provide an "Ideal" cut grade rating, and an AGS "Ideal" cut grade is considered equivalent to the "Excellent" diamond cut grade of GIA. Also, GIA provides a symmetry demerit or "non-standard brillianteering" as it is referred to by GIA sometimes, to help manufactures to improve the standardized Tolkowsky cuts. AGS uses a more accurate combination of the proportional facet ratios to determine the quantity of light return in the diamond. It also takes into account the ray tracing metrics for this purpose. In case of GIA, however, the cut grading system is based on averages which are rounded off to determine the light return phenomenon.
Coal, which is an amorphous form of carbon, is not made of pure carbon. Apart from carbon, it contains complicated organic molecules of decomposed plant and animal material, which have been compressed for millions of years, in the Earth's crust. Coal is subjected to various geological processes that change its chemical composition to form graphite. This process requires suitable conditions and millions of years to take place.
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