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

Colour zoning in ruby from Mong-Shu, Burma

Inclusions of gilalite aggregates in rock crystal from Brazil

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

«Red fox agate» from Patagonia, Argentina

Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers

Stress fissure («sun spangle») in baltic amber

Inclusion of apatite in ruby from Tanzania

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