Historia naturalis bulgarica2603-3186National Museum of Natural History (BAS)10.48027/hnb.38.01001000436000382019Research articleGemmological samples: rock crystal from two localities in the Rhodopes, BulgariaAbadjievStanislavhttps://orcid.org/0000-0001-9106-17542801201938114Stanislav AbadjievThis is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
The paper comprises gemmological and other data on several specimens of faceted rock crystal gemstones from two localities in the Madan ore field, Smolyan Province, and Krumovgrad Municipality, Kardzhali Province, of the Rhodopes, Bulgaria.
gemstonequartzRhodopesrock crystalhttps://www.nmnhs.com/historia-naturalis-bulgarica/article.php?id=000436000382019References
Anthony J.W., Bideaux R.A., Bladh K.W., Nichols M.C. (eds) 2001-2005 Quartz. Handbook of Mineralogy. Mineralogical Society of America, Chantilly, VA, handbookofmineralogy.org.
Arem J.E. 1987 Color encyclopedia of gemstones. 2nd edition. Springer, Boston, 248 pp.
Karov C., Dimitrov I. 2004 A catalogue of the mineral species in the National Museum of Natural History, Sofia (Part 2) Silicates. Historia naturalis bulgarica 16: 7-45.
Petrussenko S. 1991 Minerals of the Madan orefield, Bulgaria. The Mineralogical Record 22 (6): 439-445.
Tsintsov Z., Banushev B. 2010 Agates in Bulgaria. “Stiluet” Ltd, Publishing House “Vanio Nedkov”, Sofia, 210 pp. (In Bulgarian)