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An artist of jewelry


1186 Willis Ave. Albertson

(Willis Square)

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Useful info on the 4C's of diamond quality

The 4C's of diamonds refer to Color, Clarity, Cut and Carat weight. At Aldila Jewelers, we speak "Diamond" and when you're shopping for a diamond, you should learn the language, too. At Aldila Jewelers, we've been cutting diamonds onsite for 25 years. We'll help you find a diamond with the best quality for the money you plan to spend.

Diamond color

You may think gem quality diamonds as transparent, but truly colorless diamonds are very rare. Most diamonds for jewelry are nearly colorless, with a tint of yellow or brown. Diamonds are graded by the amount of color they have.


Some fluorescence may even appear, which means a diamond will emit light when exposed to ultraviolet light, but it has no effect on the color grading.

Diamond clarity

Clarity is a measurement of the number and size of imperfections that occur in almost all diamonds. These are microscopic and don't affect the diamond's appearance. However, the presence of these imperfections distinguishes a natural gem from synthetic stones.

Cuts of diamonds

A diamond's cut refers not to the shape so much as how the cut brings out the beauty of the diamond. The quality of the cut is determined by considering its brightness (how much white light is reflected), fire (flares of color) and scintillation. Scintillation refers to how much pattern of dark and light or sparkle, the cut allows. Cuts are rated from Excellent to Poor.

Learn the basics about diamonds before you shop so you know what to look for.

Open Monday - Friday 11:00 AM - 5:00 PM

Sunday 11:00 AM - 3:00 PM

Carat weight

One carat equals 200 milligrams and for diamonds under one carat, weight is designated by hundredths of a carat, like dollars and cents. A half carat would be expressed as 0.50 ct. A diamond is graded on all 4 C's to determine its overall qualities.

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