Glendonit
Špičaté hnědé pseudomorfózy kalcitu po ikaitu z ruské řeky Olenica.
Auripigment
Ledvinité agregáty tmavě oranžových, drobných, z boku zlatě lesklých krystalů auripigmentu. Estetický vzorek pocházejicí z devadesátých let minulého století.
Smaragd
Dva centimetry velký krystal zeleného průsvitného smaragdu s výraznou zonálností. Krystal je z obou stran ukončený bází.
Almandine, staurolite
Columnar crystals of brown staurolite with purplish garnet in a light muscovite matrix. The largest garnet crystal is 1.5 cm […]
Miersite, Cuprite, Silver
A druse of metallic lustrous octahedrons of cuprite with bushes of white silver. Onto the cuprite then grow yellow crystals […]
Cuprite
Cubes of dark metal-shiny cuprite octahedra. The largest crystal is 2 cm large.
Alexandrite
Cluster of green alexandrite crystals which exhibit color change under the light of a bulb and transition to red color.
Aenigmatite
Black well-cleavable crystal of silky lustrous aenigmatite enveloped by fibrous aggregates of astrophyllite in a greenish microcline. The crystal is […]
Malachite
Partially polished botryoidal aggregates of dark green Malachite.
Emerald
A two-centimeter large Emerald crystal unusually grown in white Feldspar .
Iron
Polished sample of natural iron formed at the contact of basalt with a coal seam.
Diopside
A druse of light green diopside crystals up to 8 mm in size. In daylight they become more intensely green […]