Question: what is indium

Robert Ives answered on 15 Jun 2019:

Whereas osmium is a very hard metal, indium is a very soft metal and can be cut with a knife, or dented with your finger nail. It melts at a low temperature for a metal (156.6 degrees C) and although it doesn’t have many uses, indium has been included at low amounts in solder wire. It conducts electricity really well and can be used to coat transistors in electrical devices. Indium is also pretty shiny (but not as shiny as osmium) and was also once used to make mirrors more reflective.

You have any ideas as to how we could use Indium?