Uvrepearl pearls are evaluated using precise measurements that help buyers understand their characteristics and value. These numerical indicators cover size, shape, surface quality, and luster. By learning how these figures are determined, consumers can make informed choices when selecting pearls for jewelry or collection purposes.

Size and Diameter Measurements

Pearl diameter is measured in millimeters using calibrated tools. Uvrepearl specimens typically range from 6 mm to 18 mm. Smaller sizes suit delicate designs while larger ones provide bold statements. The measurement process accounts for the longest and shortest axes to ensure accuracy. A difference of even 0.5 mm can affect both appearance and price. Consistent sizing within a strand is also recorded numerically to maintain uniformity.

Shape and Grade Ratings

Shape is assessed on a numerical scale where perfect roundness scores highest. Uvrepearl pearls receive ratings from 1 to 10 based on deviation from a true sphere. Near-round pearls score 8 or above and are preferred for necklaces. Baroque shapes receive lower numbers but may offer unique aesthetic appeal. Surface blemish counts are logged separately, with fewer than three minor marks considered high quality. These combined figures guide classification into commercial or premium categories.

Luster and Value Metrics

Luster is quantified by light reflection intensity on a scale of 1 to 5. Higher numbers indicate deeper glow and better light return. Uvrepearl grading also includes nacre thickness in microns, ideally exceeding 0.5 mm for durability. Price per pearl is calculated using these metrics along with size. A 10 mm pearl with top luster might command several times the cost of a smaller, lower-rated example. Tracking these numbers over time helps identify market trends without speculation.