People say 'gem' to talk about someone or something very special or nice. It means the thing or person is like a treasure.
She is a real gem of a friend.
The kids found a gem in the old toy.
In mining, a gem is a thin line of valuable stones or metals inside rocks. Miners look for these to get metals or gems.
Miners found a rich gem in the mountain.
This gem contains gold and silver.
GEM is a website where government agencies buy things. It helps buyers and sellers work online safely.
The company bids on GEM for public contracts.
GEM helps governments buy goods online.
In science, a GEM is a special container for growing plants or animals under controlled conditions. It is used in space or labs.
Scientists use a GEM to grow plants in space.
The GEM keeps a safe environment for algae.
