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Synthetic Emerald | Gemopedia
Synthetic refers to a man-made material with a natural counterpart. The synthetic crystal replicates the chemical, optical and physical properties of the natural crystal with little or no variation. Synthetic emeralds offer you the best of both worlds. You get the beauty of a beloved, rare gemstone, but at a budget-friendly price!
Colors
Light To Very Dark Green To Strongly Bluish Green
,
Slightly Yellowish Green
Synthetic Emerald Classification
Common Name
Synthetic Emerald
Species
Synthetic Beryl
Variety
Synthetic Emerald
Colors
light to very dark green to strongly bluish green, slightly yellowish green
Alternate Names
Gemstone Groups
Key Separations
Refractive index, birefringence, optic character distinguished beryl from other materials, but magnification is essential for separating synthetic beryl from natural material.
Comments
Russian product: RI 1.572 to 1.578 and 1.579 to 1.584, birefringence 0.006 to 0.007, SG 2.63 to 2.73Chinese product: RI 1.570 to 1.572 and 1.576 to 1.578, birefringence 0.006, SG 2.67 to 2.71Biron product RI 1.569 to 1.573(+/-0.001) some 1.570 to 1.578, birefringence 0.004 to 0.008, SG 2.68 to 2.71. Misnomer: cultured emerald
Synthetic Emerald Optical Properties
Transparency
Transparent To Translucent
Refractive Index
1.571-1.584 Tolerance: (+0.007/-0.002)
Birefringence
0.004-0.008
Optic Character
uniaxial
Optic Sign
negative
Polariscope Reaction
doubly refractive (DR)
Fluorescence
SWUV: Russian and Biron material:InertChinese material: moderate red
LWUV: Russian and Biron material:InertChinese material: moderate red
CCF Reaction
Sometimes bright red; not conclusive
Pleochroism
Value: moderate to strong green and blue-green or variation in tones of bodycolor
Dispersion
Strength: weak fire Value: 0.014
Comments
Synthetic Emerald Chemistry & Crystallography
Chemical Name
beryllium aluminum silicate
Chemical Formula
Be3Al2(SiO3)6
Synthesis
hydrothermal
Crystal System
Hexagonal
Classification
Silicate
Nature
Synthetic
Crystallinity
Crystalline
Comments
Synthetic Emerald Characteristic Physical Properties
Hardness
7.5
Streak
white
Specific Gravity
2.63-2.73
Toughness
Good
Inclusions
Hydrothemal synthetic emerald often contains fingerprints, liquid and 2-phase inclusions, nailhead spicules, seed plates, opaque black hexagonal plates, synthetic phenakite or chrysoberyl crystals, gold inclusions, numerous red brown and fine white particles. The white material can also have the appearance of "comet tails" or stringers. In the Chinese and some Russian material wavy or chevron like growth can be seen.
Luster
Vitreous
Stability
Good
Fracture
Conchoidal
Cleavage
Very Imperfect, Basal
Comments
