Partially etched diamond crystal
Partially etched diamond crystal
Two-phase inclusion in amethyst, Brazil
Two-phase inclusion in amethyst, Brazil
Two-phase inclusions in tourmaline from Namibia
Two-phase inclusions in tourmaline from Namibia
Agate from Reichweiler, Germany
Agate from Reichweiler, Germany
Midge included in amber from the Baltic coast, polarised light
Midge included in amber from the Baltic coast, polarised light
Twin-crystal of chrysoberyl
Twin-crystal of chrysoberyl
Colour zoning in ruby from Mong-Shu, Burma
Colour zoning in ruby from Mong-Shu, Burma
Inclusions of hematite in feldspar (sunstone), India
Inclusions of hematite in feldspar (sunstone), India