Agate from Reichweiler, Germany
Fire opal, Mexico
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
Stress fissure («sun spangle») in baltic amber
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Twin-crystal of chrysoberyl
Midge included in amber from the Baltic coast, polarised light

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