A mineral that is a yellowish, soft, heavy, and rare metal. It is used in making things like fireworks and flares.
Strontian is a special and rare thing that can make bright, fun lights.
Examples:
The miners found a lot of strontian in the cave.
Strontian is a very heavy and rare metal.
The strontian is used to make bright lights.
I want to find some strontian and make a big firework!
The strontian is so rare, it's like finding a treasure!
The strontian is very special and makes the best lights.