Dendrites in agate
Dendrites in agate
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Spinel crystal in dolomite marble, Burma
Spinel crystal in dolomite marble, Burma
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Agate from Reichweiler, Germany
Agate from Reichweiler, Germany
Colour zoning in ruby from Mong-Shu, Burma
Colour zoning in ruby from Mong-Shu, Burma
Structure in a healing fissure in topaz from Brazil
Structure in a healing fissure in topaz from Brazil
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan