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Beryl (beryllium aluminum silicate)
Types/Color:
Aquamarine – light blue to blue-green
Bixbite – Red to strawberry-red
Emerald – Green
Goshenite – colorless
Heliodor – deep yellow
Morganite – Pink to peach
Other beryls may be referred to by their color, such as green beryl and yellow beryl.
Mohs hardness: 7.5-8
Refractive index: 1.57-1.6
Critical angle: 39.5°
Specific gravity: 2.65-2.75
Cleavage: None
Fracture: Conchoidal, tough
Dispersion: Medium (.014)
Heat sensitivity: None
Pleochroism: Dichroic – Golden: weak (yellow to light-yellow); Goshenite: colorless, no dichroism; Green: distinct (yellow-green to blue-green); Heliodor: weak (gold-yellow to greenish-yellow); Morganite: distinct (pale-pink to lavender-pink); Purple: distinct (purple to colorless); Yellow: (light yellow to medium yellow).
Birefringence (double refraction): Weak (.006-.009)
Crystal structure: Hexagonal
Treatments: Aquamarine is usually heat treated to remove the greenish cast. Morganite may be heat treated to change the peachy coloring to pink and may also be irradiated. Bixbite and heliodor may be heat treated and irradiated. Goshenite may be heat treated. Emerald is almost always treated with some filling agent to reduce the visibility of inclusions. These treatments are controversial and there is no consensus as to which treatment, if any, is appropriate.
Cutting: Emerald and bixbite with heavy inclusions can break apart. Otherwise, beryl is probably the easiest stone to facet.
Polishing: Beryl polishes easily with alumina or cerium oxide.
Mystical Properties:
Emerald is a stone of love and romance. It brings and enhances joy, cleansing, clairvoyance, memory, and faith. It also benefits intuition and communication, and promotes truthfulness. Emerald is associated with the heart chakra.
The emerald is the sacred stone of the goddess Venus. It was thought to preserve love. The emerald has long been the symbol of hope. It is considered by many to be the stone of prophecy. For some the emerald acts as a tranquilizer for a troubled mind. The emerald is said to bring the wearer reason and wisdom. The strongest time for the powers of the emerald is said to be spring.
Lucky for love, give your lover an emerald to stay faithful.
In several cultures the emerald was the symbol for fertilizing rain. In the Christian faith it is the symbol of faith and hope.
Healing Properties:
Emeralds are known to heal both the phys