Holmium is a chemical element with the
symbol Ho and it has an atomic number of 67. The
atomic weight is 164.93032. 
Things you might not know about
Holmium:
- Holmium has the highest magnetic strength of
any element, and therefore is used to create the strongest
artificially generated magnetic fields.
- Holmium is one of the colorants used for
cubic zirconia and glass, providing yellow or red coloring.
- Holmium is relatively inexpensive for a
rare-earth metal with the price about US$ 1000 per kg.
See GC2XAY2 - Hydrogen, for an explanation
about this series of caches.
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