An emerald is a gemstone.
The emerald.
Emerald.
emerald
These mean the same thing. There is no difference.
an emerald is a gem, it is sometme called beryl, it is 99% green
emerald
yes a green one too!
diamond or emerald
Emerald
diamond,amethyst,garnet,emerald
The theme is green in the Emerald city scene because an emerald gem is green.
Beryllium and oxygen.