Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Spinel crystal in dolomite marble, Burma
Spinel crystal in dolomite marble, Burma
Two-phase inclusion in amethyst, Brazil
Two-phase inclusion in amethyst, Brazil
Two-phase inclusions in sapphire, Sri Lanka
Two-phase inclusions in sapphire, Sri Lanka
Two-phase inclusions in tourmaline from Namibia
Two-phase inclusions in tourmaline from Namibia
Inclusions of gilalite aggregates in rock crystal from Brazil
Inclusions of gilalite aggregates in rock crystal from Brazil
Partially etched diamond crystal
Partially etched diamond crystal
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Fire opal, Mexico
Fire opal, Mexico
Structure in a healing fissure in topaz from Brazil
Structure in a healing fissure in topaz from Brazil