What are minerals? what kinds of minerals are considered gems? (site 1)

For your second question its Diamonds,Rubys, Emeralds.
And for your first question its :Minerals are natural: These substances that form without any human help.

Minerals are solid: They don't droop or melt or evaporate.

Minerals are inorganic: They aren't carbon compounds like those found in living things.

Minerals are crystalline: They have a distinct recipe and arrangement of atoms.

Minerals are solid inorganic substances of natural occurrences.
Examples of minerals that would be considered gems are: Alexandrite, Diamond, Lapis, Paraiba, Ruby, and Topaz. There's 80, those are just a few.

I hope this helps! :>

60.0 - there are 3 significant numbers