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Opal
オパール
Mohs hardness
5.5–6.5
Mineral group
Hydrated silica (amorphous)
Color
Play-of-color
MEANING
Hope, luck & creativity
LORE & HISTORY
Its shifting rainbow “play of color” is a physical effect — light diffracting through orderly arrays of microscopic silica spheres.
CARE
Contains water; avoid prolonged dryness and sudden temperature changes.
Meanings and lore reflect widely known traditions and are not claims of effect. Hardness and mineral group are standard mineralogy — About our data