Mon 18 Aug 2008
Grade Your Diamond
Posted by Emilia under Jewelry, Uncategorized
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You sit in a secluded corner booth, with a few intimate friends, in your favorite dimly lit Italian restaurant. A handsome man, cloaked in darkness, saunters up to your party with confident strides, but muted steps, as huge and silent as his velvet vestments. He tosses a satiny pouch on your table and disappears, leaving your circle of friends in the wake of his awesome beauty. What treasure has he bestowed upon you?! Ungathering the cinched opening, gemstones of every hue and variation tumble onto the mahogany tabletop, flashing as they roll… How will you determine the value of your collection?
Clarity. The grade of clarity will determine how clean a diamond is. Miniature cracks and deposits will not affect a diamond’s brilliance and are very common. The higher grade of clarity a diamond possesses, the higher its price.
Color. Look through a stone’s pavilion for the best observation of color.
Proportion. The crown should measure 1/3 the depth of the pavilion in a brilliant cut diamond. Greater brilliance is created when proper proportions create reflections of light through the stone’s table. Poor proportions can create dark shapes to appear in the stone, which devalues the diamond by diminishing its inherent beauty.
Cut. The make of a diamond has the biggest influence on its brilliance. A good cut is also more durable. In addition to affecting reflected light, an error in cutting will cause difficulty in setting the diamond.
Fluorescence. A stone possesses fluorescence if it exhibits a color reaction when exposed to ultraviolet light. Blue fluorescence gives a diamond a whiter appearance in daylight. This particular characteristic is useful in masking a poor color grade.
Weight. Diamonds are weighed to one-hundredth of a carat and are a major determining factor in a stone’s price. Size affects weight, and weight affects price. For example, a brilliant-cut 1-carat diamond will have a diameter of 6.5 mm. A shallow diamond of this weight would be wider; a deep diamond will have a smaller diameter.



