Structure in a healing fissure in topaz from Brazil
Agate from Reichweiler, Germany
Inclusions of hematite in feldspar (sunstone), India
Fire opal, Mexico
Inclusions of gilalite aggregates in rock crystal from Brazil
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Inclusions of hematite in aquamarine, Tanzania
Colour zoning in ruby from Mong-Shu, Burma


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