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About BoncheviteHide

steel gray, lead gray
Metallic, Sub-Metallic
Named in 1958 by Ivan Kostov in honour of Georgi Bonchev [August 6, 1866, Zheravna, Kotel, Bulgaria - March 7, 1955, Sofia, Bulgaria] systematic mineralogist and professor at University of Zagreb and for most of his career at University of Sofia, Bulgaria. Bonchev received many academic honours and was also proficient in gemmology and geoarcheology.

Fleischer (1958) compared the x-ray pattern of bonchevite to those of galenobismutite and "bismuthinite" and noted their similarities. Nechelyustov and Lebedev (1967) described a "bonchevite" from Kara-Oba, Kazakhstan with x-ray and chemical data similar to Bulgarian bonchevite. Craig (1967) discovered that phases in the PbS-Bi2S system exsolved to a mixture of "bismuthinite" and galenobismutite. Kupcik et al. (1969) studied topotype bonchevite and found their specimen was a mixture of galenobismutite and a member of the andorite group. Bonev (1982) identified the unknown Kara-Oba mineral as lillianite. Birch and Mumme (1985) also studied a mineral they collected "from a vein north of Nahrechen" and they concluded their specimen was pekoite - "No inclusions were observed." Birch and Mumme (1985) concluded that a near equal mixture of pekoite and galenobismuthite would yield the reported chemical composition reported for bonchevite and by extension that the mixture was possibly a homogeneous phase that exsolved into the two phases that were consistently observed in synthetic and natural specimens.
This page provides mineralogical data about Bonchevite.

Classification of BoncheviteHide

'Grandfathered' (first described prior to 1959), Questionable

Physical Properties of BoncheviteHide

Metallic, Sub-Metallic
steel gray, lead gray
May show patchy blue to blue iridescence, etc.

Other Language Names for BoncheviteHide

Simplified Chinese:斜方硫铋铅矿

Common AssociatesHide

Associated Minerals Based on Photo Data:
Quartz3 photos of Bonchevite associated with Quartz on mindat.org.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for BoncheviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kostov, I. (1958) Bonchevite, PbBi4S2, a new mineral. Mineralogical Magazine: 31: 821-828.
Fleischer, M. (1958) New mineral names. American Mineralogist: 43: 1221-1222.
Craig, J.R. (1967) Mineralium Deposita: 1: 278-306.
Nechelyustov, G.N. and Lebedev, V.S. (1967) Dokl. Acad. Nauk SSSR: 174: 679.
Kupcik, V., Franc, L., and Makovicky, E. (1969) Tschermaks Min. Pet. Mitt.: 13: 149.
Bonev, I. (1982) Excursion Guide (Central Rhodopes), 13th General meeting of the IMA, Varna, Bulgaria, p. 22.
Birch, W.D. and Mumme, W.G. (1985) Pekoite from Narechen, Bulgaria - a possible solution to the bonchevite problem. Mineralogical Magazine: 49: 135-137.
Burke, E.A.J. (2006) A mass discreditation of GQN minerals. The Canadian Mineralogist: 44: 1557-1560.

Internet Links for BoncheviteHide

Localities for BoncheviteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Plovdiv Province
    • Asenovgrad Obshtina
Birch, W.D. and Mumme, W.G. (1985) Pekoite from Narechen, Bulgaria―a possible solution to the bonchevite problem. Mineralogical Magazine, 49(1), 135-137.
  • Guangdong
    • Shaoguan
      • Shixing Co.
        • Shirenzhang-Meiziwo W-Sn deposit
Wenfeng Zhu, Guogao Yang, Longming Wei, Shaoqin Zhang, Debin Zhou, Guangyun Liu, and Fulin Gong (2009): Journal of Guilin University of Technology 29(3), 285-291
  • Hainan
    • Ledong Co.
Bin Shu, Ping'an Wang, Faxian Dong, and Zhongjian Li (2006): Geological Bulletin of China 25(6), 745-755
  • Jiangxi
    • Ganzhou
      • Anyuan Co.
Yingchen Ren, Minqing Cheng, and Cunchang Wang (1986): Mineral Deposits 5(2), 63-74; Yingchen Ren (1999): Contributions to Geology and Mineral Resources Research 14(1), 1-12, 38; Zailin Zeng, Yongzhong Zhang, Zhenghui Chen, Yuchuan Chen, Xiangpei Zhu, Qiquan Tong, Binghua Zheng, and You Zhao (2011): Mineral Deposits 30(5), 949-958
  • Jilin
    • Yanbian Chaoxianzu
      • Hunchun Co.
        • Xiaoxinancha
Shangquan Wu (1986): Mineral Deposits 5(2), 75-84
  • Prešov Region
    • Prešov Co.
Duda et. all.,1981:Minerály severnej časti Slanských vrchov. Min.Slovca,Monografia 2,Bratislava, 98 p
  • Västerbotten County
    • Skellefteå
      • Skellefte mining district
        • Boliden
No reference listed
Mineral and/or Locality  
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