May 5th, 2006, 4 o’clock PM at the hall of Ahmed Bey mosque will be opened a visiting exhibition “Minerals – The Unfadable Flowers of Nature” of the Earth and Man National Museum, Sofia.The Permanent exhibition shows about 200 mineral samples separated in four thematic collections:

•Giant crystals – presenting 16 mono-crystals, mainly varieties of quartz – mountain crystal, smoky quartz, citrine, amethyst, milk quartz, tourmaline and muscovite too from Pegmatite fields in Brazil of Ilya Delev’s collection. Except with their beauty they also impress with their unique sizes.
•Precious and decorative stones – an imposing part of museum’s collection comprising of natural and worked samples of emerald, garnet, ruby, topaz, aquamarine, citrine, smoky quartz, tourmaline, malachite, nephrite, tiger eye, agate, etc.
•Minerals from Bulgaria and Kyustendil region – a small part of the mineral diversity of Bulgaria is shown – crystal druses of sphalerite, galena, quartz, pyrite, calcite from Madan Lead-Zinc Fields, gypsum mono-crystals and grows from Radnevo, aragonite – fluid aggregates from the village of Brusevtzi, rhodochrosite from the deposits in the village of Davidkovo, hematite –glass head and marble onyx from the deposit in Kremikovtzi, opal tree from the town of Haskovo, actinolite and garnet from Avren, etc.
The collection also presents the mineral diversity of the Kyustendil region – galena, sphalerite, chalcopyrite, pyrite, quartz, calcite, rhodochrosite and arsenopyrite from Ruen and Lebnitza deposits; orthoclase – monocrystals and grows from Kopriva and Kitka, diatomite from the village of Dragovishtitza, antimonyte and stibiconite from the village of Gjueshevo native Cu from Frolosh.
•Nature patterns – a collection of three in number natural rock pieces with surprising dendrite forms created of manganese oxides and hydro - oxides from Brazil.

The exhibition may be visited for an year in the town of Kyustendil, at the exhibition hall of the Ahmed Bey mosque.