Color: Emeralds occur in hues ranging from yellow-green to blue-green, with the primary hue necessarily being green. Yellow and blue are the normal secondary hues found in emeralds. Only gems that are medium to dark in tone are considered emerald; light-toned gems are known instead by the species name green beryl. The finest emerald are approximately 75% tone on a scale where 0% tone would be colorless and 100% would be opaque black. In addition, a fine stone should be well saturated; the hue of an emerald should be bright (vivid). - Wikipedia
The first known emerald mines were in Egypt, dating from at least 330 BC into the 1700s. Cleopatra was known to have a passion for emerald, and used it in her royal adornments.
Mohs Hardness: 7.5-8 Mohs
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. 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 Emerald mines in Upper Egypt, rediscovered a hundred years ago, are some of the oldest in the world and were called Cleopatra’s mines for her love of the stone. Emeralds were also talismans of Aristotle, Alexander the Great, Charlemagne, and the moguls of India. They’ve adorned the crowns and royal jewels of many countries for centuries, and fabulous collections and stunning gems continue to be treasured and displayed by the rich and famous today. – Crystal Vaults
Legends endowed the wearer with the ability to foresee the future when emerald was placed under the tongue, as well as to reveal truth and be protected against evil spells. Emerald was once also believed to cure diseases like cholera and malaria. Wearing an emerald was believed to reveal the truth or falseness of a lover’s oath as well as make one an eloquent speaker. – GIA
Physical, Mystical and Spiritual Properties
In every language, there were reports of the emerald helping eyesight. Additionally, the emerald’s healing powers have been associated with the skeletal system, the flesh and skin, the cardiovascular system, the adrenal glands, the kidneys, liver and intestinal system. The stone is also considered to be very cleansing and prevents infection and diseases
Emerald is an excellent stone for reviving passion, whether for an interest, a person, or a job. In addition, it is believed that wearing an Emerald improves one’s memory and intelligence, enabling one to think clearly about the past, present, and future.
Emeralds are said to detoxify negativity and transform it into positive emotional energy, and are known to be calming and balancing, promoting creativity and eloquence and restoring faith and hope. – Jewels For Me