Traditionally associated with clear thinking, restraint and calm; the classic stone of sobriety.
Composition
Silicon dioxide (SiO₂) — quartz coloured by iron and natural irradiation
Hardness · Chakra
7 · Third Eye, Crown
Amethyst fades in sunlight. Heat it and it turns yellow — most commercial citrine is heat-treated amethyst.
Traditionally linked to intuition, cycles and new beginnings.
Composition
Potassium aluminium silicate (KAlSi₃O₈) — feldspar
Hardness · Chakra
6–6.5 · Sacral, Third Eye
The floating blue glow is adularescence — light scattering between microscopic layers of two feldspars, not an inclusion or a coating.
Traditionally used for clearing a space and resetting other stones.
Composition
Hydrated calcium sulphate (CaSO₄·2H₂O) — crystalline gypsum
Hardness · Chakra
2 · Crown
Water-soluble — never rinse it. The Cave of Crystals in Naica holds selenite beams over eleven metres long, the largest natural crystals ever found.
Traditionally associated with grounding and restful sleep.
Composition
Zirconium silicate (ZrSiO₄)
Hardness · Chakra
6–7.5 · Root, Crown
Not to be confused with cubic zirconia, a synthetic diamond simulant. Natural zircon has high dispersion and real geological age.
Traditionally associated with settling anxiety and staying present.
Composition
Silicon dioxide (SiO₂) darkened by natural irradiation of aluminium impurities
Hardness · Chakra
7 · Root
Its colour comes from natural radiation acting on aluminium traces over geological time — heat it and the smoke disappears.