Amala Eunice. Diamonds. May 28th , 2017.
According to the Gemological Institute of America (GIA), the grading is not done in alphabets. Instead, colored diamonds are graded in categories mentioned below, with "faint" being the lowest grade and "fancy vivid" being the highest.
Diamond mining is hard work and companies have to scan large areas and dig deep, for any chances of successful detection. The processes use colossal extraction machinery, which has to be customized and built according to the topography of the mining site. The mining juggernaut will continue drilling and extracting the precious stone, until none are left hiding under the planet's crust.
The simple yet sophisticated lines of marquise diamond engagement rings make them one of the most popular choices for bridal sets as well as other accented rings and solitaires. Knowing what makes this particular diamond shape special and how it affects the other characteristics of the gem is crucial for couples choosing a marquise stone.
Sapphire are a type of the mineral 'corundum', which is an aluminum oxide. Their structure comprises hexagonal crystals of corundum, which makes them extremely hard. In fact, after diamonds, sapphires are the second hardest gemstones on Earth, being rated 9 on the Mohs scale. Trace elements such iron, copper, titanium, chromium, etc., present in their structures give sapphires their different colors, including blue, green, orange, purple, etc. White sapphire is the only one which has no trace element, and is thus considered pure.
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