Alexandrite is the colour-change variety of chrysoberyl, typically shifting from green to bluish green in daylight to red to purplish red under incandescent light. Commercial alexandrite is sourced mainly from Brazil, Sri Lanka, and East Africa, with the Russian Urals important historically.

Violet quartz earns its place in both jewellery and mineral collections through colour rather than rarity. The appeal of amethyst lies in how evenly or intensely that purple is distributed, from pale lilac material to richly saturated stones cut for statement pieces.

Ametrine is a bicolour quartz variety containing distinct amethyst and citrine colour zones.

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

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

Fluorite is a calcium fluoride mineral known for wide colour variation, strong cleavage, and common fluorescence.

Phosphosiderite is a hydrated iron phosphate known for distinctive lilac to purple coloration.

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

Sugilite is a rare purple cyclosilicate prized in collector and ornamental jewelry markets.

Tanzanite is one of the few gemstones whose identity is closely tied to a single modern locality. Its blue-to-violet colour and pleochroic character give it an instantly contemporary profile among transparent jewellery stones.