Brilliance: A phenomena unique and powerful in diamonds is the extent to which a diamond can reflect light. This "brilliance" is created when light enters through the diamonds table, reaches the pavilion facets, and is then refracted back out through the table to your eye.
Carat: A unit of weight by which a diamond is measured.
Clouds: A cluster of very tiny imperfections within a diamond. These imperfections will often take on a transparent cloudy look, and will require extremely high magnification in order to be seen.
Color grading: A grading method system by GIA used to determine the colorlessness of white diamonds.
Crown: The portion of the diamond above the girdle.
Crown angle: The angle where the diamond's bezel facets intersect with the girdle plane. The positioning of these facets is critical in determining the amount of light dispersion and fire in a diamond.
Culet: A flat facet diamond cutters add to the bottom of a diamond's pavilion. The purpose of the culet is to protect the integrity of the pavilion from chipping and fractures. Once a diamond is set in jewelry the purpose of the culet is generally negated as the setting will provide adequate protection for the stone. Most modern diamond shapes have either no culet, or very small pointed culet.
Cut: Refers to the proportions as well as the polish and finish of a faceted diamond. Cut is the most important of the "4 C's and is critically instrumental in determining a diamonds beauty and value.
Depth: The height of a diamond from the culet to the table. Depth is measured in millimeters.
Depth percentage: Refers to the relation between how deep and how wide the diamond is. Depth percentage plays a role in determining the brilliance and value of the diamond.Diamond: A crystallized carbon made up of 99.95% pure carbon atoms in an isometric or cubic arrangement.
Diamond cutting: The method whereby a rough diamond mined from way beneath the earth's surface is polished and faceted into a magnificent diamond. The diamond must go through a long and arduous process of many different steps until it is considered a completely finished gem.
Dispersion: The effect that properly angled and placed facets have on the diamond's ability to display fire.
Eye clean: A term used in the industry to describe a diamond with inclusions that cannot be seen with the naked eye.
Facet: The various smooth surface areas of a diamond set up and positioned at different angles, allowing light to enter the stone and reflect back to your eye. A round brilliant diamond has a total of 58 facets.
Feathers: are the small stress fractures in a diamond formed during its crystallization process. Feathers will pose no risk to the durability of the diamond once that stone has survived the rigors of its crystallization, mining, and cutting process.
Finish: This refers to the quality of how the diamond cutter executed the designing, fashioning, and faceting of the diamond.
Fire: (or Color Light)This refers to the percentage of the diamond returning bright colored light to the observer.
Fluorescence: This refers to an effect seen in diamond when exposed to long wave ultra violet light. Fluorescence is undetectable in most lighting conditions and can only be seen when placed under an intense and direct ultra violet lamp. Fluorescence has no deleterious effect on the integrity of the diamond. Some prefer Fluorescence in diamonds, others do not. It is a matter of personal taste. Fluorescence in lower color diamonds posses a unique desirability as they will make diamonds appear whiter than their actual color grade.
Diamond Repair
If your diamond chips contact Lenny Fuchs.
Quality Diamond Repairs
The Diamond Doctor Leonard Fuchs
The Diamond Doctor Leonard Fuchs
10 West 47th Street, New York, N.Y. 10036
Lenny has over 31 years of experience in diamond repair.
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