Violet-to-blue 'nuummite' from Simiuttat, Greenland: origin of colour appearance and conditions of formation

• Main Authors: Freanz, Leander, Thye Sun, Tay, Wirth, Richard, De Capitani, Christian, Hui Ying, Loke
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: 2016
• Subjects: Greenland; Nuuk; Simiuttat; Buksefjorden
• Online Access: https://edoc.unibas.ch/81569/

Iridescent orthoamphibole rock ('Nuummite') from the Nuuk District in south-west Greenland is an unusual gem material known in the trade since 1983. Unlike most Nuummite that shows a 'golden' brown iridescence, some specimens from Simiuttat in the Buksefjorden Archipelago display...