Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

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

Inclusion of apatite in ruby from Tanzania

Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

Stress fissure («sun spangle») in baltic amber

Inclusions of gilalite aggregates in rock crystal from Brazil

Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil

Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light

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