Gold
Gold lavishly grown on quartz tinted green by secondary copper minerals. The aggregate at the top of the sample measures […]
Selenium, sulphur
Černé kovově jehličky selenu s kulovitými agregáty žluté síry. Vzorek pochází z hořící haldy dolu Schöller. Vzorek je možné vyzvednout […]
Gold
A specimen of nativegold from Jílové. It is a 1.5 mm gold nugget in white quartz intergrown with dark telluride, […]
Copper in gypsum
Beautiful dendritic, thin crystals of pure copper in a clear gypsum crystal.
Copper
Native Copper flake.
Gold
Gold flakes in parent rock composed of quartz and pyrite. The largest gold flake is approximately 1 mm in size.
Iron
Polished sample of natural iron formed at the contact of basalt with a coal seam.
Arsenic
Pure arsenic in richly grown, black reniform aggregates.
Dyscrasite
Silver-shiny crystals of dyscrasite in matte black arsenic. The largest, fan-shaped cluster of dyscrasite is 8 mm in size.
Gold
Aggregates of native gold in quartz rock colored blue and green by secondary copper minerals.
Gold, shattuckite
Unusual and very elegant combination of aggregates of pure gold in contrasting blue shattuckite of gemstone quality. The largest gold […]
Gold, shattuckite
Unusual and very elegant combination of aggregates of pure gold in contrasting blue gem-quality shattuckite. The largest gold aggregate is […]