Zlato
Zlato bohatě narostlé na křemeni zbarveném zeleně sekundárními minerály mědi. Agregát na vršku vzorku má rozměry 13 × 3 mm.
Native Selenium, Native Sulphur
Černé kovově jehličky selenu s kulovitými agregáty žluté síry. Vzorek pochází z hořící haldy dolu Schöller. Vzorek je možné vyzvednout […]
Native gold
Vzorek přírodního zlata z Jílového. Jedná se o 1,5 mm velkou zlatinku v bílém křemeni prorostlou s tmavým telluridem pravděpodobně […]
Ryzí měď v sádrovci
Nádherné dendritické, tenké krystaly ryzí mědi v čirém krystalu sádrovce.
Native Copper .
Native Copper flake.
Native gold .
Gold flakes in parent rock composed of quartz and pyrite. The largest gold flake is approximately 1 mm in size.
Native iron .
Polished sample of natural iron formed at the contact of basalt with a coal seam.
Native 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.
Native 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 […]