Two-phase inclusions in tourmaline from Namibia
Two-phase inclusions in tourmaline from Namibia
Stress fissure («sun spangle») in baltic amber
Stress fissure («sun spangle») in baltic amber
Spinel crystal in dolomite marble, Burma
Spinel crystal in dolomite marble, Burma
Dumortierite in rock crystal, Brazil, polarised light
Dumortierite in rock crystal, Brazil, polarised light
Agate from Reichweiler, Germany
Agate from Reichweiler, Germany
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Inclusions of gilalite aggregates in rock crystal from Brazil
Inclusions of gilalite aggregates in rock crystal from Brazil
Agate from Anzi, Maroc
Agate from Anzi, Maroc