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Blue Onyx is a banded variety of Chalcedony (microcrystalline quartz), with a Mohs hardness of 6.5 to 7. The name "onyx" historically refers to any banded chalcedony, with the prefix denoting color.
Honest note: in the broader trade, "Blue Onyx" is sometimes used loosely for banded blue calcite or dyed material. The pieces we carry are natural banded chalcedony with soft blue coloration from trace minerals during formation, not dyed.
It forms in cavities and veins within volcanic rocks, where silica-rich fluids slowly deposit microcrystalline layers over time.
Blue Onyx is traditionally associated with calm communication, focus, emotional steadiness, and gentle protection. Many people work with this stone for clear-headed thinking during difficult conversations, settling racing thoughts, and finding their voice without overheating.
It's a steady, grounded stone in the throat-energy family.
These are traditional associations drawn from historical practice. This stone is not a substitute for medical or mental health care.
A starting place for your own quiet practice.
