Fire opal, Mexico
Inclusions of hematite in aquamarine, Tanzania
Dendrites in agate
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Two-phase inclusion in amethyst, Brazil
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Inclusions of hematite in feldspar (sunstone), India
Inclusions of fossil plant debris in opal from Wollo, Ethiopia

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