Queen Conch Shell

The queen conch lives throughout the Caribbean Sea, the Florida Keys and around Bermuda, in seagrass beds, sand and algal flats and rubble, mostly in water less than 100 feet (30 m) deep. Its large, heavy, whorled shell has short spines at the apex and a pink interior lip, and can reach about 30 cm and up to 3 kg. CITES notes that the queen conch is traded for both its meat and its shell.

Conch shell shows pink to orange coloring with a flame-like structure: under magnification, parallel elongated crystals give a silky sheen on a porcelain-like surface, without the iridescent overlapping platelets of nacre. Fashioned shell beads usually reveal concentric or parallel bands of white, cream and pink that run through the bead, a feature normally absent in conch pearls. GIA warns that queen conch shell beads are sometimes used to imitate valuable conch pearls and may be misrepresented as "shell pearls" or "pearls"; Raman spectroscopy confirms aragonite and natural polyenic pigments. Plastic shell imitations feel warm and often show mold marks.

The pink color is not fully stable under radiation: in GIA experiments, 15 minutes of X-ray exposure turned queen conch shell from pink to a less saturated purplish color, and about 4 hours under a short-wave UV lamp faded its pink, while long-wave UV for 6 hours and the sunlight and fluorescent lighting tested caused no visible change. Avoid unnecessary X-ray and UV exposure.

Conch shells have long been carved into cameos (IGS), and GIA notes that pink conch pearls from the same mollusk were especially popular in jewelry around the turn of the 20th century. Overharvesting caused rapid declines, and the queen conch was included in CITES Appendix II in November 1992; CITES reviews in the mid-1990s and 2003–2005 led range states to adopt export quotas, temporary trade suspensions and harmonized fishery rules. In 2024 NOAA Fisheries listed the species as threatened under the US Endangered Species Act.

The Japanese retailer Pascle, which calls queen conch a "pearl mother shell" like mother-of-pearl, associates it with maternal love and says it is traditionally regarded as a charm for safe childbirth and harmony between couples. These are retailer-attributed beliefs, not verified effects.