Pearl Lustre Very Good — The Working Standard for Fine Cultured Pearls
Pearl Lustre Very Good — The Working Standard for Fine Cultured Pearls
GIA's second-tier lustre grade, where bright reflections meet sharp definition without commanding Excellent prices
Very Good is the second-highest tier in GIA's five-step pearl lustre scale, sitting directly below Excellent and above Good, Fair, and Poor. A Very Good lustre describes a pearl with bright, sharp surface reflections whose edges are well defined and only slightly less crisp than the mirror-like presentation of Excellent grade. Very Good is the working standard for fine cultured-pearl jewellery and represents the best-value grade for buyers who want top-tier presentation without paying the premium that the Excellent designation commands at the upper end of the market.
What Very Good lustre looks like
Under daylight-balanced light at arm's length, a Very Good pearl shows a clear, bright reflection of the light source with sharply defined edges. The shape of a fluorescent tube, window mullion, or overhead light is rendered crisply on the curve of the pearl, nearly indistinguishable in casual viewing from an Excellent-grade reflection. Side-by-side comparison with an Excellent-grade pearl reveals a slight reduction in intensity or a faint softening of the reflection's edges, but the difference is subtle and often visible only to a trained grader.
Underlying causes
Very Good lustre typically corresponds to nacre thickness in the range of about 0.5 to 0.8 millimetres in akoya production, with well-ordered nacre platelets, clean surfaces, and an even outermost layer. Tahitian and South Sea pearls reaching Very Good grade carry substantially thicker nacre as a consequence of their longer cultivation periods, often 1.5 to 2 millimetres or more. The platelet stacking is regular enough to produce coherent reflection across most of the surface, with only minor disorder reducing sharpness.
Cultivation conditions, oyster health, and water temperature during the final months before harvest all influence whether a pearl finishes at Very Good or pushes into Excellent. Cooler water and patient harvest scheduling tend to produce the tighter platelet ordering that distinguishes the top two grades from the rest of production.
Identification
GIA's grading method assesses lustre at arm's length under controlled illumination, on the cleanest portion of each pearl. Very Good-grade pearls show bright reflections with sharp, well-defined edges; the reflected image's outline is clear and the brightness is high. The grade for a strand is taken from the bulk of the pearls, with the standard allowance for outliers.
In the trade
Very Good is the practical sweet spot for fine pearl buyers. The grade appears widely in serious cultured-pearl production from akoya farms in Japan, Tahitian production in French Polynesia, and South Sea production in Australia, Indonesia, and the Philippines. Very Good-grade akoya strands typically trade at ten to twenty per cent below Excellent-grade equivalents of the same size and shape. The discount is meaningful but not severe, and the visual difference is small enough that many trade professionals consider Very Good the optimal balance of presentation and price.
For South Sea and Tahitian pearls, where individual large pearls can carry significant per-pearl value, the Excellent-to-Very-Good differential can compound noticeably across a matched strand. Buyers building round white South Sea strands for high-end retail commonly accept Very Good lustre on the larger drilled positions where Excellent-grade matched pearls are difficult to source.
Very Good lustre is the minimum we typically recommend for clients commissioning classic strands intended for formal occasions or as heirloom-quality investment pieces. Below Very Good, the visual softening becomes obvious in photographs and in side-by-side comparison with the better strands a discerning buyer will see at the auction houses or at top retail.
Care
Pearls at Very Good grade benefit from the same handling as higher grades — wipe with a soft cloth after wear, keep away from cosmetics and perfumes, and store in a soft pouch isolated from harder gem materials. Silk-strung strands should be restrung every two to three years with regular wear.