Two-phase inclusion in amethyst, Brazil

Two-Phase inclusions and rutile needles in rock crystal from Brazil

Inclusion of apatite in ruby from Tanzania

Structure in a healing fissure in topaz from Brazil

Natural etching structure on a crystal face of diamond (trigons), polarised light

Inclusions of hematite in feldspar (sunstone), India

Stress fissure («sun spangle») in baltic amber

Fire opal, Mexico

Midge included in amber from the Baltic coast, polarised light