Rhinestones
A rhinestone is an imitation diamond used in costume jewelry and to decorate clothes. You can shop rhinestone beads from Pandahall.com.
An imitation gem is a man-made or synthetic stone that mimics the appearance of a natural gemstone. These gemstones are typically created in a lab using materials that resemble the properties of the natural stone they are imitating.
rhinestone
In Sanskrit 'gem' is called 'ratnam(n)[ रत्नम्]'.
Imitation diamonds or fake diamonds are also known as faux diamonds. Or "simulant" as used by the industry insiders. It refers to materials, such as CZ, that look like another gem.
a biogenic gem is a gemstone made of biological origin
A gem collector
There is nothing called a "gold" "gem". Something is either made of gold or it is a gem, but it is not both.
Pearls
pearls
You are such a gem! The gem fell onto the floor.
Yes, some gem stones are made to make jewelry. but not all.