The museum currently houses about 16,500 specimens. They are grouped as follows (numbers are approximate): Systematic collection - 10,000 specimens from Romania and the most significant occurrences worldwide, illustrating more than 700 mineral species; Regional collection - 1,500 mineral samples from Romania; Native gold collection - almost 500 samples; Meteorite collection - 204 specimens; it is the most important collection of its kind in Romania; Gem collection - 230 cut gemstones Romanian gems collection - 3,500 gems and ornamental stones. Collection of mineral species first described from Romanian occurrences - 40 samples, Radioactive minerals collection - 200 samples, Crystallography c...ollection - 1,250 specimens. Among the most valuable specimens one can mention: rare mineral species (gold, tellurium, tellurides, some silicates), large crystals (pyrite, tetrahedrite, aragonite, halite, quartz, gypsum etc.), meteorites and gemstones (precious stones, gemstones, and ornamental rocks). The systematic exhibit completely fills the first room. Approximately 4,500 specimens of the nine mineral classes are on display in 36 showcases. More than 700 distinctive mineral species (a total of 850 mineral names, including varieties) originating from Romania or around the world, from a wide range of geologically-significant occurrences are represented. The regional collection of minerals from Romania contains the core (13 showcases out of 23) of the exhibit in the second room of the museum. More than 70 occurrences representing classical mines but also surface outcrops are illustrated. From the Meteorite collection, more than 100 fragments are on display in a showcase in the second room. It represents the only collection of this type in Romania. The whole Gem collection is on display in its original 19th century cabinet in the second room; it represents one of the main general attractions of the museum. The Romanian gems exhibition, consisting of about 1,200 gemstones and ornamental rocks - most of them cabochons, is located in two showcases. The specimens are grouped on panels, according to regional and mineralogical criteria. The collection is the most complete and diverse one in Romania.