Fire opal, Mexico
Colour zoning in ruby from Mong-Shu, Burma
«Red fox agate» from Patagonia, Argentina
Inclusions of gilalite aggregates in rock crystal from Brazil
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Partially etched diamond crystal
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Inclusion of apatite in ruby from Tanzania

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