Traditionally associated with concentration, sorting priorities and mental order.
Composition
Calcium fluoride (CaF₂)
Hardness · Chakra
4 · Third Eye, Heart
Fluorescence is named after this mineral — many specimens glow blue-violet under ultraviolet light.
Traditionally linked to grounding, focus and physical steadiness.
Composition
Iron oxide (Fe₂O₃)
Hardness · Chakra
5–6 · Root
Metallic grey on the outside, blood-red as powder — hence the Greek haima, "blood". NASA named a Martian region after it, evidence of past water.
Traditionally associated with rational thought and calm discussion.
Composition
Sodium aluminium silicate chloride (Na₈Al₆Si₆O₂₄Cl₂)
Hardness · Chakra
5.5–6 · Third Eye, Throat
Often mistaken for lapis lazuli, but sodalite lacks the gold pyrite flecks and runs a flatter, more uniform blue.
Traditionally linked to truthfulness, study and speaking with authority.
Composition
Rock of lazurite with calcite and pyrite
Hardness · Chakra
5–6 · Third Eye, Throat
Ground into ultramarine, the most expensive pigment in Renaissance painting — more costly than gold, which is why it was reserved for the Virgin's robe.
Traditionally linked to clear expression and cutting through confusion.
Composition
Aluminium silicate (Al₂SiO₅)
Hardness · Chakra
4.5–7 (varies by direction) · Throat, Third Eye
One of the few minerals with two hardness values: about 4.5 along the crystal and up to 7 across it. Cutting it requires knowing which way you are working.