Opal

Opal is a non-crystalline, water-bearing silica material. It its play-of-colour inspired admiration and superstition from Rome to Australian mining history.

Its physical identity is distinct from spiritual interpretation. It is associated with imagination, changeability and emotions becoming visible. These correspondences are symbolic uses in modern crystal culture, not measured mineral effects.

Lukewarm soapy water and a soft cloth suit general care; avoid impact, thermal shock and harsh chemicals. Spiritual interpretations belong to belief and personal experience; they do not replace medical diagnosis or treatment. Mineral dust must not be inhaled during cutting or grinding.

Sources: GIA Gem Encyclopedia, Mindat mineral database, Metropolitan Museum gem history.