Ideal-Scope, the IdealScope diamond cut grading tool for Ideal Cut Diamonds

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NEWSLETTERS

Ideal-Scope Newsletter Issue # 3

The beauty of a diamond is a result of a complex interplay of
light return and contrast

Light Return

	Diamond facets act like windows and mirrors, concentrating the brightness from light sources, and then returning it to your eyes. The redder an Ideal-Scope image, the brighter the diamond.

		Photo of the same diamond.
	Excellent light return (red colour)

Leakage			Contrast
All diamonds leak some light. Generally less leakage is better. Leakage appears as white areas in an Ideal-Scope.
A ray of light leaking out of the pavilion.	Leakage is easy to see with an Ideal-Scope.	The dark ring is caused by leakage.
			Leakage can create Contrast
			Small areas of leakage around the girdle add contrast in the spaces between the star tips. Firey flashes are often from girdle leakage areas, especially in prong set diamonds.

Tip: Diamonds with leakage look brighter and more firey in high open backed ring settings, so light can get in the back.

Too much girdle leakage makes a diamond look small. A small amount of girdle leakage aids contrast	Pale pink in the table area is normal. It is not as bad as it appears. The pale area only leaks 25% and returns 75%.

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