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.
Diamonds Certifications:
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).
Pearl Certifications:
Gemological Institute of America (GIA)
Created by the Gemological Institute of America (GIA) in the 1940s, the 7 Value Factors — Size, Shape, Color, Luster, Surface, Nacre and Matching — serve as the universal standard for assessing pearl quality.
Pearl Size: The larger the pearl, the more valuable. The size expectations vary by type - South Seas are typically larger, while Akoyas are smaller.
Pearl Shape: Round pearls are the most prized, followed by symmetrical drops. Baroque pearls through irregular, are gaining popularity.
Pearl Color: Pearls are beloved in a variety of body colors. Overtone and orient greatly increase the beauty and value of the pearls
Pearl Luster: The finest pearls glow brightly without any dull, chalky areas. The sharper and brighter the reflection the better the luster.
Pearl Surface: High surface quality pearls should be smooth with minimal blemishes. Minor imperfections can often be hidden by drill holes or mounting.
Pearl Nacre: The combination of the continuity, thickness and condition of a pearls nacre affects the quality of the pearl.
Pearl Matching: The pearls in a strand should match in their quality factors - especially luster, shape and surface.