RE: Pegmatite -
Krystyna - 13-04-2026
https://www.gia.edu/gems-gemology/summer-2025-colored-stones-unearthed#general-description
RE: Pegmatite -
Krystyna - 13-04-2026
Pegmatite Nepheline
Pegmatitic igneous rock from Tredalen near Larvik. Gray is nepheline, yellowish brown is wöhlerite, black is hornblende, pink is K-feldspar, and gray is magnetite. The width of the specimen 14 cm. From Sand Atlas.
Pegmatytowa Skała Magmowa z Tredalen koło Larviku.
Szary kolor to Nefelin, żółtawobrązowy to Wöhleryt, czarny to Hornblenda, różowy to Skaleń Potasowy, a szary to Magnetyt.
Szerokość okazu 14 cm. Z Atlasu Piaskowego
https://www.alexstrekeisen.it/english/pluto/nephelinepegmatite.php
RE: Pegmatite -
Krystyna - 13-04-2026
Cancrinite Pegmatite: Yellow Cancrinite with black Biotite, Nepheline and Alkali Feldspar. Litchfield, Maine.
Photo by W. Cordua, From Wisconsin Geological and Natural History Survey.
Pegmatite Cancrinite
https://www.alexstrekeisen.it/english/pluto/cancrinitepegmatite.php