about
NATURAL DIAMONDS
We have never suggested a diamond based solely on selling. Diamonds are for-profit or in search of beauty. While we keep our diamond prices competitive with the reality of the market, we offer additional value by conveniently identifying the most desirable stones.
about
LAB DIAMONDS
Through the expertise of the Promise by Gina team, comprised of GIA (Gemological Institute of America) appraisers operating in New York's Diamond District, where diamonds from around the world gather, we can provide the highest quality lab-grown diamonds verified by international standards at a reasonable price, along with an IGI (International Gemological Institute) appraisal report.
Diamond Shape
ROUND
OVAL
PRINCESS
PEAR
ASSCHER
CUSHION
EMERALD
RADIANT
GIA 4Cs Clarity
- Flawless (FL) - No inclusions or blemishes are visible to a skilled grader using 10× magnification
- Internally Flawless (IF) - No inclusions and only blemishes are visible to a skilled grader using 10× magnification
- Very, Very Slightly Included (VVS1 and VVS2) - Inclusions are difficult for a skilled grader to see under 10× magnification
- Very Slightly Included (VS1 and VS2) - Inclusions are minor and range from difficult to somewhat easy for a skilled grader to see under 10x magnification
- Slightly Included (SI1 and SI2) - Inclusions are noticeable to a skilled grader under 10x magnification
- Included (I1, I2, and I3) - Inclusions are obvious under 10× magnification and may affect transparency and brilliance
GIA 4Cs Color
GIA’s color-grading scale for diamonds is the industry standard. The scale begins with the letter D, representing colorless, and continues with increasing presence of color to the letter Z, or light yellow or brown. Each letter grade has a clearly defined range of color appearance. Diamonds are color-graded by comparing them to stones of known color under controlled lighting and precise viewing conditions.
GIA 4Cs Carat Weight
Diamond carat weight is the measurement of how much a diamond weighs. A metric “carat” is defined as 200 milligrams.
Each carat can be subdivided into 100 ‘points.’ This allows very precise measurements to the hundredth decimal place. A jeweler may describe the weight of a diamond below one carat by its ‘points’ alone. For instance, the jeweler may refer to a diamond that weighs 0.25 carats as a ‘twenty-five pointer.’ Diamond weights greater than one carat are expressed in carats and decimals. A 1.08 carat stone would be described as ‘one point oh eight carats.’
GIA 4Cs Cut
The GIA Cut Grading System applies to the most popular cutting style – the standard round brilliant – and all clarities across the D-to-Z color range. There are five cut grades: Excellent (EX), Very Good (VG), Good (G), Fair (F) and Poor (P).
- The Excellent cut grade is very bright. It shows an even pattern with good contrast between light and dark areas, so the reflections appear crisp and well-balanced. This tells you that the cutter made the best possible use of the rough.
- The Good cut grade diamond isn’t quite as bright – reflections aren’t as sharp and there’s more darkness or dullness in the diamond.
- The Poor cut grade diamond has much more prominent dark areas or dullness.