Hedenbergite from Septemvri Mine (Deveti Septemvri Mine), Madan Municipality, Smolyan Province, Bulgaria
Bulgaria | |
| [var. Manganese-bearing Hedenbergite] A. Piestrzynski (2001) Mineral Deposits at the Beginning of the 21st Century. pp 925-928 |
Bulgaria | |
| [var. Manganese-bearing Hedenbergite] A. Piestrzynski (2001) Mineral Deposits at the Beginning of the 21st Century. pp 925-928 |