Set(s) of 14 Unique name(s), containing Er
(in parenthesis - number of cards)
| AGARDITE-(Y) (1) | OXIDE_Er (1) |
| CHROMATITE (1) | SCHEELITE (4) |
| ERBIUM (1) | SILICATE_Ba_Er (1) |
| FLUORTHALENITE-(Y) (1) | SILICATE_Er (1) |
| FRANCISITE (1) | TANTEUXENITE (1) |
| GARNET (1) | WAIMIRITE-(Y) (1) |
| LANGBEINITE (1) | XENOTIME (1) |