Twin-crystal of chrysoberyl

Spinel crystal in dolomite marble, Burma

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

Fluid inclusions in quartz with bituminous daughter minerals, China

Colour zoning in ruby from Mong-Shu, Burma

Agate from Anzi, Maroc

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

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

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