YAG is another term for yttrium aluminium garnet, a synthetic material used in lasers and formerly as an artificial gemstone.

An yttrium iron garnet is a synthetic material used for its magnetic properties.

YAG stands for yttrium aluminum garnet, the name of the laser used for this procedure.

Yttrium is used to increase the strength of aluminium composite.

The addition of yttrium to alloys generally improves workability, adds resistance to high-temperature fragments, and significantly enhances resistance to high-temperature insulators

Applications of yttrium and yttrium compounds: synthetic aluminium-yttrium and other garnets, minor alloying element for other metals, additive to stabilize zirconium oxide, special glasses or ceramics, component of superconductors, the isotope Y-90 is used in radiotherapy of cancers, phosphors for TV screens etc.