Inclusions of gilalite aggregates in rock crystal from Brazil

Stress fissure («sun spangle») in baltic amber

Two-phase inclusion in amethyst, Brazil

Bubbles and swirls in moldavite (natural glass)

Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

Two-phase inclusions in tourmaline from Namibia

Twin-crystal of chrysoberyl

Colour zoning in ruby from Mong-Shu, Burma

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