Dumortierite in rock crystal, Brazil, polarised light
Agate from Anzi, Maroc
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Partially etched diamond crystal
Inclusion of apatite in ruby from Tanzania
Inclusions of hematite in feldspar (sunstone), India
Spinel crystal in dolomite marble, Burma
Dendrites in agate
Two-phase inclusions in sapphire, Sri Lanka
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
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