Lorelli's Jewelry | www.lorellisjewlery.com

Choosing Your Diamond

GIA Color Scale

Color

The GIA Color Scale extends from D (colorless) to Z (light yellow or brown). Although many people think of gen quality diamonds as colorless, truly colorless diamonds are actually very rare. Most diamonds used in jewelry are nearly colorless with tints of yellow or brown.

GIA Diamond Scale

Color grades are determined by comparing each diamond to a master set. Each letter grade represents a range of color and is a measure of how noticable a color is.

Some diamonds can emit a visible light when exposed to ultraviolet radiation, but fluorescence is not a factor in determining color or clarity grades. However, a description of its strength and color is provided on GIA Reports as an additional identifying characteristic.


Clarity

The GIA Clarity Scale includes eleven clarity grades ranging from Flawless to I3. Because diamonds form under tremendous heat and pressure, it is extremely rare to find a diamond that lacks any internal and external characteristics. These characteristics are a by-product of its formation and help gemologists separate natural diamonds from synthetics and simulants, and identify individual stones.


Sample Diamond Clarity Diagrams

Sample Diamond Clarity Diagrams
GIA Clarity Scale

GIA Cut Scale

Cut

The GIA Color Scale ranges from Excellent to Poor. GIA provides a cut quality grade for standard round brilliant diamonds that fall in the GIA D-to-Z color range.

A polished diamond's beauty lies in its complex relationship with light: how light strikes the surface, how much light enters the diamond, and how, and in what form light returns to your eye.

The result is a magnificent display of three attributes. is the combination of all white light reflecting from the surface and interior of a diamond. Fire describes the "flares" of color emitted from a diamond. Scintillation describes the flashes of light you see when the diamond, the light, or the observer moves.

A polished diamond's proportions affect its light performance, which in turn affects its beauty and overall appeal. Diamonds with fine proporations, symmetry, and polish optimize their interaction with light, and have increased brightness, fire, and scintillation.

Anatomy of a Diamond

 

Carat Weight

One carat equals 200 milligrams in weight. For diamonds under one carat, each carat is divided into 100 points - similar to pennies in a dollar. 0.75 ct. = 75 points, 1/2 ct. = 50 points.

Carats

 

Beauty and Its Beholder

The 4 Cs provide a way to objectively compare and evaluate diamonds, but numbers alone can't describe a diamond's mysterious and captavating beauty - for that, you'll have to visit us in person.