Inclusion of apatite in ruby from Tanzania

Structure in a healing fissure in topaz from Brazil

Agate from Reichweiler, Germany

Agate from Anzi, Maroc

Bubbles and swirls in moldavite (natural glass)

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

Fire opal, Mexico

Spinel crystal in dolomite marble, Burma

Inclusions of hematite in feldspar (sunstone), India