This attractive small cabinet specimen features reddish-brown andradite crystals from the classic Skjerpemyr locality in the Grua mining district near Lunner, Akershus, Norway. The crystals are developed on a natural green to gray skarn matrix, creating a distinct color contrast with the lustrous garnet crystals.
The andradite crystals display a pronounced greasy to vitreous luster. Together with the contrasting matrix, this gives the specimen a characteristic mineralogical and aesthetic appeal.
Classic Skarn Locality in the Grua Mining District
Skjerpemyr is one of the well-known skarn localities of the Grua mining district and has a long collecting history. The deposit is known for numerous characteristic skarn minerals.
The area has been legally protected as a natural monument since 1984. Mineral collecting and excavation are not permitted there, giving older collection specimens from Skjerpemyr a special connection to the locality.
With dimensions of 5.5 × 4.5 × 3.5 cm and a weight of 106.2 g, this is a compact small cabinet specimen. Its particular appeal lies in the contrast between the reddish-brown andradite crystals and the green-gray skarn matrix.
| Feature | Details |
|---|---|
| Mineral Type | Andradite |
| Locality | Skjerpemyr Mine, Grua mining district, Lunner, Akershus, Norway |
| Dimensions | 5.5 × 4.5 × 3.5 cm |
| Weight | 106,2 g |
| Size category | Small cabinet specimen |
| Color | Reddish-brown crystals on a green-gray matrix |
| Luster | Greasy to vitreous |
| Matrix | Natural skarn matrix |
| Morphology | Andradite crystals on a contrasting matrix |
| Special Feature | Contrasting andradite specimen from a classic, now protected Norwegian locality |
| Mineral | Andradite |
|---|---|
| Color | Brown, Red |
| Size | Small cabinet specimen (5-7 cm) |
| Continent | Europe |
| Country | Norway |
| Feature | Classic locality |
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