Science girl on Twitter: "Neodymium glass (also known as Alexandrite glass), changes colour according to different lighting conditions, here you can see it's quite dramatic Such glass is produced with the inclusion
Art Deco Neodymium Glass Ashtray, 1920s for sale at Pamono
Neodymium Lowball – Pretentious Glass Co.
Youghiogheny Dark Purple, Blue & Pink Stipple Neodymium Glass (N367SP) - Franklin Art Glass
File:Neodymium glass light bulb under fluorescent and incandescent light.jpg - Wikimedia Commons