Two-phase inclusion in amethyst, Brazil
Natural etching structure on a crystal face of diamond (trigons), polarised light
Agate from Reichweiler, Germany
Partially etched diamond crystal
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Midge included in amber from the Baltic coast, polarised light
Fire opal, Mexico
Stress fissure («sun spangle») in baltic amber

Impressum

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