Legrandite

Carat weight is highly significant for faceted legrandite, as cuttable rough is exceedingly rare and usually small. Even tiny faceted stones can be noteworthy, while larger, well-formed crystals are more often preserved as collector specimens rather than sacrificed for cutting.

Color is a major factor. The best legrandite shows vivid, saturated lemon-yellow to golden-yellow hues with good transparency. Pale, washed-out or heavily included material is less prized, though still collectible given overall rarity.

Legrandite crystals frequently contain inclusions, fractures and internal stress. Transparent, clean zones suitable for cutting are exceptional. Any faceted gem with reasonable transparency and minimal eye-visible inclusions is considered rare and valuable.

Cutting legrandite is technically demanding and rarely undertaken, as cleavage and brittleness lead to a high risk of breakage. Those few stones that are cut typically use simple, protective shapes and proportions to preserve as much material as possible while showcasing color.

Legrandite is known from only a handful of localities, most famously the Ojuela Mine in Durango, Mexico, which has produced world-class specimens. Even there, gem-quality rough is extremely limited, and modern production focuses on collecting crystals for mineral cabinets rather than for cutting.

Demand is almost entirely collector-driven, both for mineral specimens and for the very few faceted stones that reach the market. It is virtually unknown to the general jewelry-buying public.

Recent Trends: niche but stable collector interest, with fine, well-documented stones achieving strong prices through specialist dealers and auctions.