Diamond FAQ’s: From Fancy Color to Fluorescence


Buy a diamond isn’t as complicated as a person would think, despite what it says in the fancy diamond buying guide. Research into what diamond to buy can range from “It’s beautiful, sparkly and I want it,” to investigating the arcana of cut, carat size, inclusions and how the stone fluoresces under ultraviolet light. One way to tell a diamond, by the way, is that most fluoresce under ultraviolet light! Following is a brief diamond buying guide that runs from Asscher cut to brilliance, from fancy color to fluorescence. Here are a few aspects of diamond jewelers in Barrington Illinois Texas to buy diamonds and engagement rings.

Asscher Cut

This cut was invented by the Asscher Brothers in the early years of the 20th century. It is a square cut with large step facets, a small top or table and a high crown.


The reflection of light from the front and back facets of a cut diamond.

Brilliant Cut

This is the most popular cut for a diamond. Each brilliant cut has 58 facets, no matter how big or small the diamond.


A unit of weight that’s equal to one fifth of a gram. One carat equals 100 points.


The clarity of a diamond depends on how free it is from inclusions.


The small facet at the base of some brilliant cut diamonds.


This is how the diamond is shaped to best show off its radiance and beauty. A highly skilled jeweler knows how to balance symmetry, polish and proportion to best effect.


A flat surface on a cut diamond.

Fancy Color

Diamonds that are colors other than white or transparent are called fancies. They can range from the palest yellow to black. Some fancy diamonds are more expensive than white ones. Red and purple diamonds are the rarest.


This describes the colors that are seen when a facet splits the white light into its component colors.


This happens when a diamond gives off visible light after being struck by an ultraviolet or other high energy wavelength.


A gemstones widest circumference. It’s the boundary between the crown and the base, which is called the pavilion.


These are internal features in gemstones. Ideally, a perfect diamond has none.

Marquise Cut

This is a cut where the diamond has a girdle shaped like a boat. The curved sides meet at point at the top and bottom. This cut is also called a navette.

Synthetic Diamonds

These diamonds are produced in the lab and are indistinguishable from natural diamonds. Only lab equipment can tell them apart.

E-mail: info@mjmillerjewelers.com
Phone: 847-381-7900
Fax: 847-381-5542
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