Minus 13, plus one: lab-grown finds its one-carat floor

§1The crash kept crashing, except where it mattered.

The lab-grown price collapse has been the trade's most reliable storyline for three years, so the surprise in analyst Edahn Golan's second-quarter wholesale price list, published by INSTORE this week, is not the headline decline. It is the exception. Lab-grown wholesale prices fell 13 percent year on year in aggregate, but one-carat rounds, the engagement-ring workhorse of the category, rose 1 percent. In a market where every other size bucket is still sliding, the single most important size found a floor and edged upward.

§2Margins fell where they were fattest.

The rest of the list reads the way the last twelve quarters have read. Rounds of 1.50 to 1.99 carats fell 11 percent; two-carat rounds dropped 20 percent; fancy shapes, the hearts, marquises, ovals and pears that fueled the category's fashion moment, gave up 17 percent on average. Square shapes fared worst, down 21 percent, with some VVS-clarity ranges off more than 25 percent. The steepest cuts landed exactly where margins used to be fattest. Larger stones historically carried the highest wholesale profit, and as Golan notes, "that left them more exposed to retail and consumer pressure to lower prices."

The one-carat firming is not a statistical stray. It matches what this page has tracked since spring: wholesalers report the most stable demand in the category sits at one carat, where lab-grown's value proposition against a natural stone at several times the price is easiest for a consumer to grasp and hardest for a retailer to discount further without giving the goods away. When a price has been cut to the bone, the first sign of health is not a rally; it is that the cutting stops.

§3Rising rough asks a question retail must answer.

The list carries one forward-looking note that deserves attention. Rough lab-grown prices have recently increased, and the question for the next two quarters is whether those higher input costs pass through to polished wholesale and eventually retail, or die against the same consumer resistance that crushed the big stones. A category that spent a decade teaching shoppers its price only moves down will find the opposite lesson slow going.