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 Gemology information

Emerald is the green member of the beryl mineral family (which also includes Aquamarines). Its fine intense green coloring is due to a trace of chromium or vanadium replacing the aluminum in the beryl structure. Because of the nature of this replacement, almost no Emeralds with intense color are free from inclusions. These inclusions are acceptable as long as they do not take away from the durability or beauty of the stone.

Since natural Emerald can contain liquid and gas inclusions, jewelers use care as this gemstone needs to be kept away from any high heat -- Emeralds should not be cleaned in an ultrasonic machine or steam cleaned.

The name Emerald is from the Greek "smaragdos" (green), through the Latin "smaragdus" to Middle English "esmeralde."

TREATMENT: Commonly oiled to hide flaws, like cedar wood oil.

MOHS HARDNESS: 7.5-8 A hard stone, but subject to care because of internal liquid filled inclusions and fractures.

CHEMICAL COMPOSITION: Be ₃ Cr ₂ Si ₆ O ₁₈

REFRACTIVE INDEX: o=1.577, e=1.583 (+/- .017)
(The angle light is bent traveling through a gemstone)

DENSITY (SPECIFIC GRAVITY): 2.68-2.78
(The number of times heavier a gemstone is compared to water)

PRINCIPAL SOURCES: Colombia, Zambia, Brazil, Afghanistan

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-Enhancement Disclosure - FTC Guidelines , Esmerald.com use only not permanent colorless oil (cedar wood oil) and epoxy resins (Permasafe). See care requirements. Product listed are oiled, you can select Permasafe in any Emerald order. Unenhancement emeralds, have special prices not listed in the website.
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