Structure in a healing fissure in topaz from Brazil
«Red fox agate» from Patagonia, Argentina
Fire opal, Mexico
Agate from Anzi, Maroc
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Stress fissure («sun spangle») in baltic amber
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia

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