Synthetic Sapphire | Gemopedia

Some gems, like sapphire, are highly coveted but rare to find, much less in the sizes and quality people dream of owning. Laboratory created jewels offer you the best of both worlds. You get the beauty of a beloved, rare gemstone, but at a budget friendly price. The term 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. Just like natural gemstones, each full production of Jewelry Television's lab created gemstones is quality graded to ensure excellence.
Alternate
Names
Lab Created Sapphire
Colors
Violet Blue To Greenish Blue

Synthetic Sapphire Classification

Common Name

Synthetic Sapphire

Species

Synthetic Corundum

Variety

Flux-Grown Synthetic Sapphire

Colors

violet blue to greenish blue

Alternate Names

lab created sapphire

Gemstone Groups

Key Separations

refractive index, birefringence, pleochroism, magnification and spectrum

Comments

Synthetic Sapphire Optical Properties

Transparency

Transparent To Opaque

Refractive Index

1.762-1.77 Tolerance: (+0.009/-0.005)

Birefringence

0.008-0.01

Optic Character

uniaxial

Optic Sign

negative

Polariscope Reaction

doubly refractive (DR)

Fluorescence

SWUV: weak to moderate chalky blue to blue-green to yellowish green
LWUV: inert

CCF Reaction

Pleochroism

Value: moderate to strong violet blue and greenish blue

Dispersion

Strength: moderate fire Value: 0.018

Comments

Synthetic Sapphire Chemistry & Crystallography

Chemical Name

aluminum oxide

Chemical Formula

Al2O3

Synthesis

flux-melt

Crystal System

Hexagonal

Classification

Oxide

Nature

Synthetic

Crystallinity

Crystalline

Comments

Synthetic Sapphire Characteristic Physical Properties

Hardness

9

Streak

Specific Gravity

3.95-4.1

Toughness

Excellent

Inclusions

Platinum platelets from the crucible that appear metallic in reflected light but appear dark when stone is lit from behind. Flux is often white, brownish, yellow or orange but can be colorless. Flux inclusions can appear like natural fingerprint inclusions, wispy veils, comet tails, coarse globules of flux that can have a myriad of appearances from drippy, tubular or rod like or icicle looking, to clouds and minute particles, Stone might display angular growth zoning similar to natural.

Luster

Subadamantine To Vitreous

Stability

Very Good

Fracture

Conchoidal

Cleavage

None, May Show Parting On Twinned Stones

Comments

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