As a gemologist with over a decade of experience in the diamond industry, I can provide you with a detailed answer regarding the value of a .25 carat diamond. However, it's important to note that the value of a diamond is determined by four main factors known as the Four Cs: Carat, Cut, Color, and Clarity.

The carat is the weight of the diamond, and while a .25 carat diamond is relatively small, it can still hold significant value depending on the other Cs. The cut of a diamond greatly affects its brilliance and sparkle, with a well-cut diamond being more valuable. The color of a diamond ranges from colorless to yellow, with the former being more desirable and thus more expensive. Lastly, the clarity refers to the presence of inclusions or blemishes within the diamond, with a flawless diamond being the most valuable.

Other factors that can influence the price include the shape of the diamond, the quality of the polish and symmetry, and whether the diamond has any fluorescence. Additionally, the brand or retailer selling the diamond, as well as the current market demand, can also affect the price.

Without specific information on the cut, color, clarity, and other characteristics of the .25 carat diamond in question, it's challenging to provide an exact value. However, as a rough estimate, a .25 carat diamond can range from a few hundred to several thousand US dollars, depending on the quality and characteristics of the stone.

To get an accurate valuation, it's best to consult with a reputable jeweler or gemologist who can assess the diamond in person and provide a professional appraisal.

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If the stone sold at a 25 percent discount, its price per carat would be $1,300 x 0.75 = $975/ct. and the price per stone, $975 x 0.39 ct. = $380.25. To locate the per-carat price for a parcel of 0.18 to 0.22 carat diamonds with an average color of I-J and clarity SI2, select the 0.18 to 0.22 carat size matrix.read more >>