Two-phase inclusions in tourmaline from Namibia
Two-phase inclusions in tourmaline from Namibia
Spinel crystal in dolomite marble, Burma
Spinel crystal in dolomite marble, Burma
Agate from Reichweiler, Germany
Agate from Reichweiler, Germany
Fire opal, Mexico
Fire opal, Mexico
Stress fissure («sun spangle») in baltic amber
Stress fissure («sun spangle») in baltic amber
Agate from Anzi, Maroc
Agate from Anzi, Maroc
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Structure in a healing fissure in topaz from Brazil
Structure in a healing fissure in topaz from Brazil
Inclusions of hematite in feldspar (sunstone), India
Inclusions of hematite in feldspar (sunstone), India
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers