Sardonyx

Sardonyx

SCIENCE / MINERALOGY
Sardonyx is a commercial onyx name. True onyx is straight-banded chalcedony (SiO₂), but decorative-stone markets also use 'onyx' for banded calcite or aragonite, so composition must be verified.

GEOLOGY & FORMATION
True onyx forms through repeated silica deposition in cavities and fractures; carbonate onyx forms in spring, cave, and hydrothermal deposits.

METAPHYSICAL PROPERTIES
Sardonyx is traditionally associated with clarity, balance, resilience, and intentional personal growth. Its natural structure, color, and geological history provide a symbolic framework for approaching change with greater awareness. Practitioners commonly use it as a contemplative aid for reflecting on priorities and choosing a more deliberate response instead of reacting automatically. These associations are part of crystal traditions and are not scientifically established medical effects.

KEY PROPERTIES
Clarity • Balance • Resilience • Grounding • Perspective • Growth • Intention

CHAKRA: Root • Third Eye
ELEMENT: Earth • Air
ZODIAC: All Zodiac Signs
MOHS HARDNESS: 6.5–7 if chalcedony; ~3–4 if carbonate

ACCURACY / TRADE-NAME NOTE
Commercial onyx names are often ambiguous; verify composition before assigning geology or hardness.