R1: Characterization and description of minerals (Joint Session with The Gemmological Society of Japan)

[R1P-06] Amethyst Crystals from Mitsuiwa-mountain in Nanmoku Village, Gunma Prefecture

*Masayuki KAWASAKI¹ (1. Tsukuba City)

Keywords:Quartz, Amethyst, Clay Vein

Amethyst crystals from Mitsuiwa-moutain, Nanmoku Village were reported. Druses in black clay vein between limestone and green schist included amethyst, inclusion-bearing quartz and the aggregation of small quartz crystals.