| | Description | |
| Quality of samples: | not specified / average specimens | | Confirmation | |
| Validity: | Believed Valid | | References | |
| References: | Berylium mineralisation in Pb-Zn ore deposit Krushev dol, Madan district, Bulgaria Zh. Janakieva, Ch. Nachev, Sh. Sirakov . “Geosciences 2008”, Proceedings. | | Data | |
| Mineral Data: | Click here to view Bertrandite data | | Locality Data: | Click here to view Krushev dol deposit, Krushev dol mine, Madan ore field, Rhodope Mts, Smolyan Oblast, Bulgaria |
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