Midge included in amber from the Baltic coast, polarised light
Inclusions of gilalite aggregates in rock crystal from Brazil
Agate from Anzi, Maroc
Colour zoning in ruby from Mong-Shu, Burma
Natural etching structure on a crystal face of diamond (trigons), polarised light
Two-phase inclusions in tourmaline from Namibia
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Inclusion of apatite in ruby from Tanzania

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