| DESCRIPTION: | No. 63162 | 
| Mineral: | Calcite with phantom-growth zoning of Mottramite inclusions over Duftite | 
| Locality: | Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia (Type Locality for Duftite) | 
| Description: | Lustrous transparent colorless rhombohedral calcite crystals to 14 mm phantom-growth zones of an earlier generation of calcite crystals coated with gray-brown mottramite microcrystals. The calcite cluster grew over a core of green duftite microcrystals. Ex. Mort Metersky collection #Ca-1265, director of International Calcite Collectors Association | 
| Overall Size: | 5x5x2.5 cm | 
| Crystals: | micro to 14 mm | 
| Archived: | For reference only |