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

Misnomer: cultured emeraldChatham material: RI 1.561 to 1.564, Fluorescence: stones will show a weak to moderate red in LW and SW but stronger reaction LW.Gilson I material RI: 1.564 to 1.569, SG: 2.66; Gilson II material RI: 1.562 to 1.567, SG: 2.66Gilson I & II material: Fluorescence: generally stones show a weak to moderate red reaction under LW and SW, but with a stronger reaction to LW; other stones might have weak to moderate yellowish green, yellow or orange reaction under LW and SW.Gilson III material RI:1.57 to 1.579, Fluorescence: Inert, SG 2.68 to 2.69.Russian material RI: 1.559 to 1.563 Fluorescence: stone will show a weak to moderate orange-red reaction under LW and they are inert to SW, SG: 2.66

Synthetic Emerald Optical Properties

Transparency

Transparent To Translucent

Refractive Index

1.562-1.569 Tolerance: (+/-0.003)

Birefringence

0.003-0.005

Optic Character

uniaxial

Optic Sign

negative

Polariscope Reaction

doubly refractive (DR)

Fluorescence

SWUV: Variable by manufacturer
LWUV: Variable by manufacturer

CCF Reaction

red

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

flux-melt

Crystal System

Hexagonal

Classification

Silicate

Nature

Synthetic

Crystallinity

Crystalline

Comments

Synthetic Emerald Characteristic Physical Properties

Hardness

7.5

Streak

white

Specific Gravity

2.66-2.69 Range: to 2.69

Toughness

Good

Inclusions

Flux grown emeralds might exhibit residual flux inclusions that look like wispy veils, fingerprints with interconnecting channels and sometimes the inclusions will appear course or give a cloudy or cottony appearance. Stones often show 2-phase inclusions. Occasionally platinum crystals from the crucible can be seen in the stone. Sometimes synthetic phenakite or chrysoberyl crystals can form. Stones often show uniform growth planes.

Luster

Vitreous

Stability

Good

Fracture

Conchoidal

Cleavage

Very Imperfect, Basal

Comments

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