Agate
Pattern, banding and translucency are usually more important than a single “grade”. Learn its mineral identity, hardness, care, common treatments, authenticity notes and traditional associations.
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Colour: <span>Grey</span>
Mineralogy, identification, care, lapidary craft, interiors and documented cultural history—with traditional beliefs clearly labelled as a separate subject.
Celestite
Often appears as delicate sky-blue crystals lining pale matrix or geode cavities. Learn its mineral identity, hardness, care, common treatments, authenticity notes and traditional associations.
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