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Natural Cat Eye Emerald 5.94ctWiki
Weight: 5.94ct
Dimensions: 10.35 x 9.70 x 8.44mm
Front
With light
GRS report Large
From realgems.org:
Formula Emerald: Be3Al2Si6O18
Agee, Emerald, Émeraude, Esmeralda, Smaragdas, Smaragdi, Smaragds, Smarald, Smeraldo, Szmaragd, Zamrud, Zümrüt, Ngọc lục bảo, Изумруд, 綠寶石, زمرد, ברקת, มรกต, エメラルド
Mineral class: silicates
Crystal system: hexagonal
Mohs scale: 7.5 - 8
Density (g/cm3): 2.67 - 2.78
Refractive index: 1.565 - 1.602
Color: Green in variations, caused by traces of chrome (Cr3+) which partially replaces the aluminium atoms in the unit cell
Fluorescence: -
Pleochroism: green - blue-green - yellow-green
Largest faceted gemstone: 1,347 ct with inclusions. The 858 ct "Gachala Emerald" from the Vega de San Juan mine in Gachalá (Cundinamarca), is one of the largest emeralds. It was found in 1967, and donated to the Smithsonian Institution by Harry Winston.
Perfect and without visible inclusions: "Tsar of Russia", 30 ct.
Deposits: Worldwide. Famous for the best known specimens: Muzo / Vasquez-Yacopi Mining Distr. / Boyacá Dep. / Colombia Chivor / Guavio-Guateque Mining Distr. / Boyacá Dep. / Colombia
Name: from the Greek word "smáragdos" (green stone)
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