Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Two-phase inclusions in sapphire, Sri Lanka
Twin-crystal of chrysoberyl
Stress fissure («sun spangle») in baltic amber
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Inclusions of gilalite aggregates in rock crystal from Brazil
Two-Phase inclusions and rutile needles in rock crystal from Brazil

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