Diamond Education

At The Diamond Mine we offer top quality diamonds such as GIA and EGL Certified diamonds, as well as non-certified guaranteed graded diamonds. All diamonds sold at The Diamond Mine come with a money back guarantee. With contacts in the NYC Diamond Dealers Club and a network of diamond dealers in the country and overseas, The Diamond Mine can offer top quality diamonds in any shape for a great price.

Stop in with your choice of diamond and no matter what your budget, Jeff and Robert will find you that perfect diamond with a price you will love.


A diamond's cut is considered to be the most important of the four Cs. It is important to understand how a diamond's proportions and the relationship between them affects its brilliance, fire, and scintillation.

Ideal CutIdeal Cut Diamond
Cut, more than any other quality aspect, gives the diamond its sparkle. A diamond gets its brilliance and scintillation by cutting and polishing the diamond facets to allow the maximum amount of light that enters through its top to be reflected and dispersed back. When all the angles are correct, the light that enters is dispersed back through the diamonds top facets.

Inferior Cut Diamond

Most diamonds are "spread" in their cutting to retain maximum weight from the original rough. A heavier diamond will result, but so does a dramatic sacrifice of potential fire and brilliance. The width and depth have the greatest effect on how light travels within the diamond, and how it exits in the form of brilliance.

Shallow Cut DiamondShallow Cut Diamond
When a diamond is cut too shallow, light leaks out of the bottom, brilliance is lost and the diamond appears watery, glassy and dark. A diamond with these characteristics is referred to as a "fisheye".

Deep Cut DiamondDeep Cut Diamond
When a diamond is cut too deep, light leaks out of the sides, brilliance is lost and the center of the diamond will appear to be dark. A diamond with these characteristics is referred to as a "nailhead".


Diamond color is one of the most important factors to consider, as it is noticeable to the "naked" eye. A diamond's color is graded by GIA on an alphabetical scale from D-Z, with D being absolutely colorless and Z being light yellow. Beyond "Z", a diamond is considered to be a "Fancy" color. Although many diamonds appear to be colorless, the many of them have at least a hint of body color.

GIA and AGS Color Grading Scale
GIA and AGS Color Grading Scale

Diamond color has a significant impact on its value. To ensure the highest quality diamonds for your selection Adiamor carries diamonds in the color range from D-K only. When buying a diamond, take into consideration that it is often very difficult to detect the difference between a colorless diamond (D-F) and a near colorless diamond (G-J), especially when it is mounted in jewelry. Diamonds with a K-Z color grade usually have yellow shading that can be detected by the naked eye, however, a well cut stone with good proportions will still release the brilliance and fire of a lower colored diamond, dispersing light in such a way so as to create a beautiful stone.

The Impact of Fluorescence

Fluorescence is not directly related to a diamond's color. This separate characteristic refers to the diamond's ability to fluoresce under ultraviolet (UV) light. Our sun emits some UV light, but it is usually not great enough to detect fluorescence. When exposed to UV light, many diamonds will give off a distinctive glowing blue coloration. Although fluorescence may be displayed in various colors, blue is the most common in diamonds. The fluorescence of a diamond is defined by its intensity as either None, Faint, Medium, Strong, or Very Strong. Although fluorescence is a characteristic that can be measured, it is rarely an issue when selecting a diamond and is usually not detectable to the eye.

The impact of fluorescence on price depends on its noticeability. Faint fluorescence has very little effect on a diamond of any color, and therefore has no effect on value. For some higher color stones (D-G), strong fluorescence may give the stone a milky white appearance, which greatly lowers value. Fluorescence often adds value to lower color stones, such as I and lower, as it gives the stones a whiter, brighter appearance


Most diamonds have unique clarity characteristics, much like a fingerprint. These distinguishing characteristics can be classified as inclusions and blemishes. Inclusions are enclosed within a diamond, or they extend into the diamond from its surface. Blemishes are confined to the diamond's surface. These characteristics can detract from the pure beauty of the diamond. When light enters a diamond, it is reflected and refracted out. If there is anything disrupting the flow of light in the diamond, such as an inclusion, a proportion of the light reflected may be lost.

The table below provides an explanation of the clarity grades and demonstrates the effect that clarity has on diamond pricing, assuming carat, cut and color remain the same. To get the most value, Adiamor suggests selecting a diamond that is "eye clean" where no internal flaws are visible to the unaided eye.The sample images shown depict how a flaw (inclusion or blemish) may appear under 10X magnification.

GIA AGS Image Description
0 Flawless and Internally Flawless Flawless and Internally Flawless Flawless: No inclusions or blemishes of any sort under 10X magnification. Internally Flawless: No inclusions, but some minor blemishes.
1-2 Very Very Slightly included Very Very Slightly included Contains minute inclusions that are very difficult to see under 10X magnification, even for an experienced grader.
3-4 Very Slightly Included Very Slightly included Contains minute inclusions when observed with effort under 10X magnification. An excellent value as there is no noticeable difference to the unaided eye from VVS.
5-6 Slightly Included Slightly Included> Contains inclusions noticeable under 10x magnification. An SI1 should not have any eye visible inclusions, but SI2 may, depending on the size and location of the flaws.
7-8-9 Included Included Contains inclusions that are obvious under 10X magnification and possibly to the unaided eye. Adiamor does not carry I-grade clarity.