Akoya pearls are marine cultured pearls known for high lustre, round shape, and white to cream body colour with overtones.

Amber is fossilized tree resin used as an organic gemstone and archaeological material.

Astrophyllite is a rare complex silicate mineral seen as bronze radiating blades in matrix material.

Blue coral is generally a trade product category and often involves dyed or treated coral material.

Chrysocolla is a hydrated copper silicate gemstone material, frequently occurring as massive blue-green aggregates.

Gem coral is an organic biogenic material composed of coral skeleton polished for ornamental use.

Freshwater pearls are cultured biogenic gems produced in freshwater mollusks.

Honey calcite is a yellow variety of calcite used for ornamental stones and carvings.

Iceland spar is a transparent variety of calcite noted for pronounced birefringence and double refraction.

Pearl is an organic gem formed by mollusks, represented in trade by both natural and cultured products.

Pink coral is an organic gem material widely used in decorative jewelry, often requiring treatment and sourcing disclosure.

Red coral is an organic gemstone material with longstanding decorative and cultural use.

Selenite is a transparent crystalline gypsum variety used in decorative and collector contexts.

Seraphinite is a trade name for feather-pattern clinochlore used in decorative jewelry.

South Sea pearl is a premium saltwater cultured pearl category known for large size and satin-like luster.

Tahitian pearl is a premium dark saltwater cultured pearl category.