Ele Willoughby, PhDWhile blue kyanite is used in jewelry, porcelain & pottery glazes, plus gets physics points as an index mineral, it’s the extraordinary ‘reindeer blood’ tenebrescent, & phosphorescent tugtupite “King of Fluorescent Minerals” which is also a gem, gaining both art and physics points for me. #MinCup25
Vote tugtupite in the Mineral Cup 2025 finale here:
Zeke 🇨🇦