Adularia is a low-temperature orthoclase feldspar variety historically associated with moonstone-type adularescence.

Aegean opal is a trade-name opal category and should be handled as opal mineraloid material with seller-specific locality disclosure.

Agate is a banded chalcedony variety of quartz identified by concentric or parallel growth bands and waxy lustre.

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

Apophyllite is a hydrated silicate mineral group known primarily as collector crystal material and occasional faceted gem.

Blue lace agate is a pale blue banded chalcedony variety with fine lace-like white patterns.

Blue moonstone is a trade term for moonstone-type feldspar showing a blue sheen effect.

Botswana agate is a finely banded agate variety known for subtle grey-brown and pinkish tones.

Bumblebee jasper is a trade name for a patterned volcanic-sedimentary composite material, not a true quartz jasper.

Cactus quartz is a trade name for spirit-like quartz clusters where small crystals cover a larger central crystal.

Cat's-eye moonstone is moonstone-type feldspar showing a chatoyant band in suitable cabochon orientation.

Chevron amethyst is an amethyst-quartz banded variety characterized by angular purple-white zoning.

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

Crazy lace agate is a Mexican banded agate known for dense swirling lace-like patterning.

Dendritic agate is chalcedony containing tree-like manganese or iron dendritic inclusions.

No gemstone has a stronger reputation for durability than diamond, and that reputation is grounded in crystal structure rather than marketing. Its exceptional hardness, high lustre, and ability to return crisp light make it central to both jewellery and industrial applications.

Freshwater pearls are cultured biogenic gems produced in freshwater mollusks.

Goshenite is often discussed with one eye on colour and the other on where the material comes from. That combination of blue body colour, 7.5 Mohs hardness, and vitreous lustre is what usually makes it recognisable in practice. The secondary green note often matters more than people expect when separating it from lookalikes.

Harlequin opal is a trade pattern descriptor for precious opal with geometric, patchy color play.

Ice quartz is a trade name for quartz with frosted or crackled internal appearance.

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

Jade is valued as much for texture and toughness as for colour. A fine piece has a compact, almost glowing appearance that feels different from ordinary green ornamental stone, which is one reason jade has held cultural importance for so many centuries.

Part of the identity of Jadeite comes from the producing regions associated with it. That combination of green body colour, 6.5 Mohs hardness, and silky lustre is what usually makes it recognisable in practice. The secondary white note often matters more than people expect when separating it from lookalikes.

Laguna agate is a prized Mexican agate known for tight, colorful fortification banding.

Lemurian quartz is a trade term for naturally striated quartz crystals, not a distinct mineral species.

Moss agate is chalcedony containing green mineral inclusions that resemble moss or vegetation.

Moss chalcedony is a chalcedony variety featuring natural dendritic or mossy internal inclusions.

Ocean agate is a trade-name patterned agate category rather than a separate mineral species.

Ocean jasper is a trade name for orbicular patterned chalcedony/jasper material, chiefly from Madagascar.

Ocean jasperite is a trade descriptor for patterned ornamental material, not a strict mineral species.

Ocean reef is treated as a broad trade label for decorative patterned material.

Onyx is a parallel-banded chalcedony variety of quartz, traditionally black and white in layered form.

Orthoclase is a monoclinic potassium feldspar species and an important member of the moonstone feldspar series.

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

Pinfire opal is a pattern descriptor for precious opal with fine pinpoint color flashes.

Rainbow moonstone is a trade name typically applied to white labradorite showing colorful flash.

Sardonyx is a banded chalcedony combining sard-colored and onyx-style layers.

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

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

Spirit quartz is a trade name for quartz clusters with sparkling secondary overgrowths.

Tugtupite is a rare pink feldspathoid known for UV fluorescence and light-sensitive color behavior.

White opal is opal with light body tone, occurring as common or precious opal types.

Zebra jasper is a patterned ornamental stone category defined by high-contrast striping.