Diamonds
Colored Stones
Colored Stones
Robert & Gabriel Jewelers has a vast inventory of both natural, and lab created diamonds. we deal in certified and non-certified stones.
Colored Stones
Colored Stones
Colored Stones
Robert & Gabriel Jewelers has a vast inventory of color stones in different shapes and sizes to choose from for that special piece.
Pearls
Colored Stones
Pearls
Robert & Gabriel Jewelers sells and repairs pearl jewelry. We sell strands and single pearls. We offer a selection of different colors, shapes, sizes and origins.
Gemological Institute of America (GIA) &
International Gemological Institute (IGI) Diamond Education
Created by the Gemological Institute of America (GIA) in the 1940s, the 4 C's — cut, color, clarity, and carat — serve as the universal standard for assessing diamond quality. Each C represents a distinct quality attribute, measured on its own scale:
Diamond Cut: Graded from Excellent to Poor on the GIA scale and Ideal to Poor on the International Gemological Institute (IGI) scale. Cut determines how effectively a diamond's facets interact with light, creating the gem’s signature brilliance and sparkle.
Diamond Color: Graded from D (colorless) to Z (light yellow or brown). Diamond color refers to the absence of color, with completely colorless diamonds being the most valuable and rare.
Diamond Clarity: Graded from Flawless (FL) to Included (I3). Clarity measures how free a diamond is from inclusions (internal characteristics) and blemishes (surface flaws).
Diamond Carat: Measured in metric carats, where one carat equals 200 milligrams. Carat is a measurement unit that describes a diamond's weight, with one carat equaling 200 milligrams (roughly the weight of a paperclip).
