Emerald is the birthstone related to those born in the month of May
Although Emerald is associated with May as a birthstone, as far as the Zodiac signs the Emerald is associated with the Cancer. The origin of these are different in history and hold different meaning in different cultures.
It’s also the gem of the 20th and 35th wedding anniversaries.
Emerald's name is derived from the Greek word smaragdus, meaning "green gem".
There are other green gems, like tourmaline and peridot, but emerald is the one that’s associated with the richest greens and lushest landscapes. Ireland is the Emerald Isle. Seattle, in the US state of Washington, is the Emerald City. Thailand’s most sacred religious icon is called the Emerald Buddha, even though it’s carved from green Jadeite.
Natural, transparent Emerald is one of four “precious” gemstones (including Diamond, Ruby and Sapphire), and is the green variety of Beryl, a beryllium aluminum silicate mineral colored by trace amounts of chromium and/or vanadium. Emerald occurs in hues ranging from yellow-green to blue-green, with the finest being a pure verdant green hue, medium to dark in tone. Light colored gems are usually known by the species name, Green Beryl. Most Emeralds are highly included with surface breaking fissures, so their toughness, or resistance to breakage, is usually classified as generally poor.
Emerald was considered a symbol of eternal life in ancient Egypt, a gift of Thoth, the god of wisdom, and was a favorite jewel of Queen Cleopatra. The first known emerald mines were in Egypt, dating from at least 330 BC into the 1700's. The Emerald mines in Upper Egypt, rediscovered a hundred years ago, were called Cleopatra’s mines for her love of the stone.
Emerald has been a source of fascination and reverence in many cultures for over six thousand years, sold in the markets of Babylon as early as 4,000 B.C. It was a stone worshipped by the Incas, believed by the Chaldeans to contain a goddess, and was highly honored in all major religions for its spiritual power and beauty.