You searched for: “an emerald
emeralds, an emerald
Brittle gems which have a tendency to chip and are rarely flawless.

The rich green color of these stones are caused by the presence of chromium, a hard white metal.

In ancient times, powdered emerald was believed to cure fever and the plague.

Emeralds are formed from a combination of three main minerals: silicon (the chief constituent of sand and quartz), aluminum, and beryllium.

Colombia is the source of the finest emeralds.

This entry is located in the following unit: Gemstones or Precious and Semi-Precious Stones + (page 1)
A unit related to: “an emerald
(the four gemstones which are most valuable are diamonds, sapphires, rubies, and emeralds; and anyone would be impressed with a gift of a diamond, a sapphire, an emerald, or a ruby piece of jewelry)