Πράσινο Περίδοτο - 5.08 ct - ALGT (B)
Αρ. 80646429
1 pcs Πράσινο Σμαράγδι - 0.91 ct - ALGT (B)
Αρ. 80646429
1 pcs Πράσινο Σμαράγδι - 0.91 ct - ALGT (B)
algt colored stone identification report number 37742381
identification
species .................................................................................... natural beryl
variety ............................................................................................... emerald
description
Shape & Cutting Style ..................................... Marquise, Mixed Cut Measurements ................................................. 9.02 x 4.90 x 3.87 mm Carat Weight ............................................................................. 0.91 Carat Color ........................................................................... Intense/Vivid Green Transparency ......................................................................... Transparent
additional grading characteristics
color quality grade ................................................. fine color quality
suggested origin ...................................................................... colombia
comments
minor amount of resin in fissures.
clarity enhancement in emeralds is a common practice in trade. this enhancement is reversible at any time.
main properties of emerald
Chemical Composition ................................................. Be3Al2(SiO3)6 Crystal System ..................................................................... Hexagonal Mohs Hardness ........................................................................ 7.5 - 8.0 Specific Gravity ..................................................... 2.62 - 2.80 g/cm3 Optical Character .................................................................... Uniaxial- Refractive Index ............................................................ 1.560 - 1.602 Birefringence ................................................................... 0.004 - 0.010
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