Fluid inclusions in quartz with bituminous daughter minerals, China
Fluid inclusions in quartz with bituminous daughter minerals, China
Two-phase inclusion in amethyst, Brazil
Two-phase inclusion in amethyst, Brazil
Spinel crystal in dolomite marble, Burma
Spinel crystal in dolomite marble, Burma
Fire opal, Mexico
Fire opal, Mexico
Natural etching structure on a crystal face of diamond (trigons), polarised light
Natural etching structure on a crystal face of diamond (trigons), polarised light
Twin-crystal of chrysoberyl
Twin-crystal of chrysoberyl
Midge included in amber from the Baltic coast, polarised light
Midge included in amber from the Baltic coast, polarised light
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Agate from Reichweiler, Germany
Agate from Reichweiler, Germany
Stress fissure («sun spangle») in baltic amber
Stress fissure («sun spangle») in baltic amber