CMS Magnetics® Grade N52 Super Strong Neodymium Magnet Ring OD1.26" x ID 1/2" x 3/8" - Rare Earth Magnet Ring for Classroom, Science Project and DIY Applications - One Pack : Amazon.co.uk:
Neodymium | Rare Earth Element, Uses & Properties | Britannica
What is Neodymium - Properties of Neodymium Element - Symbol Nd | nuclear-power.com
Neodymium (Nd) Metal - EPI Materials
The mineralogy of Neodymium
Neodymium Magnets 5x2mm - 50 units (N52) - GSW-9261
10mm dia x 5mm thick Ultra High Performance N52 Neodymium Magnet - 3.2kg pull ( Pack of 10 ) : Amazon.co.uk: Business, Industry & Science