Emerald is the green variety of beryl. Beryl comes in many colors, like blue, red, yellow.
limestone
Emerald is made of the mineral beryl, although it is a gemstone. It has trace amounts of chromium and sometimes vanadium.
It is not a mineral
Emerald is a mineral but it is not an acid.
Emerald is a mineral, not a rock.
An emerald is a mineral.
Emerald belongs to the beryl mineral group, which is a type of ring silicate mineral. Other minerals in this group include aquamarine, morganite, and heliodor, all of which have different colors due to impurities.
It is a very hard rock with sandpaper like feel.
Malachite is a very bright and cool one, but if you are more of the pretty type, emerald works too!
Emerald is a mineral rather then a rock (rocks are made of minerals). Emeralds are a variety of the mineral beryl.
Emerald
Cyclosilicates.
Emerald is a mineral. Specifically, it is a variant of the mineral known as beryl.