Optical Spectra of Sugilite, KNa₂Fe₂(Li₃Si₁₂)O₃₀

• Fritsch E, Shigley JE (1994) Causes of the purple and pink colours of manganoan sugilites from the Wessels mine, South Africa. Mineralogical Magazine 58, 681-685.
• Li P, Guo Y (2025) The impact of mineral composition and trace metal cations on the body color of South African Sugilite Jade. Scientific Reports 15, Article 23887