Two-phase inclusion in amethyst, Brazil
«Red fox agate» from Patagonia, Argentina
Agate from Reichweiler, Germany
Spinel crystal in dolomite marble, Burma
Structure in a healing fissure in topaz from Brazil
Stress fissure («sun spangle») in baltic amber
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Fluid inclusions in quartz with bituminous daughter minerals, China
Inclusions of gilalite aggregates in rock crystal from Brazil
Bubbles and swirls in moldavite (natural glass)
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