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           The Mineralogy-Crystallography section was developed on the basis of the collection donated by collector Constantin Gruescu of Ocna de Fier. The collection includes 200 samples from Romania, from other European countries (France, Switzerland, Germany, Hungary) as well as from other continents: South America (Bresil) and Africa (Sahara).

           It is the second big collection of this kind offered to the city of Iasi, the first such instance being the donation the Russian general Pavel Kiselleff made to the Natural Science Museum. It should be mentioned that the city of Iasi was the first in Romania to have a section of geology, the initiative belonging to the university professor Gr. Cobalcescu, author of the first geology treaty in Romania.

           Mention should also be made of Romania chemist Petru Poni’s interest in mineralogy as he actually discovered two ores: adenite and brostenite. The mineralogy of the region of Banat, as exhibited in the museum, is unique by its particular shapes and the beauty of the iron ores. There are iron components present as draperies, marcasite and pyrites. Dognecei Mountains are situated in the northwestern part of Banat Mountains, between Poganisului and Carasului Valleys, to the north and south, respectively. In Banat Mountains, about 250 types of minerals have been identified so far, while only in the area of Ocna de Fier, Dognecea, their number exceeds 100. The collection of the museum includes all these types of ores, as represented by samples of different shapes and colours. It is worth mentioning the most beautiful andradite garnets, of a yellow-brownish colour, the melanite garnets of rhomboid shapes, crystalline muschitovite of the iron rose type. Sulphurets (pyrites, marcasite, covelline, realgar, auropigment, stibine, blende, galena) are as spectacular as well, and so are the quartz varieties whose different colours (pink, violet, smoky grey, milky white) charm the visitors’ eyes. are worth mentioning.

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