Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Inclusion of apatite in ruby from Tanzania
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusions of gilalite aggregates in rock crystal from Brazil
«Red fox agate» from Patagonia, Argentina
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Inclusions of hematite in feldspar (sunstone), India
Structure in a healing fissure in topaz from Brazil

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