Scandium is scarce in nature, making it precious and mostly used in high-tech areas.

Rare Metal

Although it's a metal, scandium's usage is not common in everyday items but rather in specialized scientific equipment.

Scientific Usage

Talking about scandium usually suggests advanced technology and science topics; it's not used in everyday conversations.

Technically Advanced

 Not only did Mendeleev completely nail gallium, he predicted other elements that were unknown at the scandium, germanium, rhenium. The element he called eka-manganese is now called technetium.