Iolite
Its directional colour change is one of the most useful visual clues for identification. Learn its mineral identity, hardness, care, common treatments, authenticity notes and traditional associations.
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Colour: <span>Violet</span>
Mineralogy, identification, care, lapidary craft, interiors and documented cultural history—with traditional beliefs clearly labelled as a separate subject.
Amethyst
Known for purple colour zoning that can range from pale lilac to deep violet. Learn its mineral identity, hardness, care, common treatments, authenticity notes and traditional associations.
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