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
Light Violet-Blue
, Blue
, Strongly Green-Blue

Synthetic Sapphire Classification

Common Name

Synthetic Sapphire

Species

Synthetic Corundum

Variety

Flame-Fusion Synthetic Sapphire

Colors

light violet-blue, blue and strongly green-blue

Alternate Names

lab created sapphire

Gemstone Groups

Key Separations

refractive index, birefringence, pleochroism, magnification with immersion and spectrum

Comments

Stones might show polishing marks and poor polish. The stones will tend to be cut in calibrated sizes and with be symmetrical.

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 might be visible through the table facet

Dispersion

Strength: moderate fire Value: 0.018

Comments

Synthetic Sapphire Chemistry & Crystallography

Chemical Name

aluminum oxide

Chemical Formula

Al2O3

Synthesis

flame fusion

Crystal System

Trigonal

Classification

Carbonate

Nature

Synthetic

Crystallinity

Crystalline

Comments

Synthetic Sapphire Characteristic Physical Properties

Hardness

9

Streak

white

Specific Gravity

3.95-4.1

Toughness

Excellent

Inclusions

Might show face up color zoning, curved striae that crosses facet junctions and strings of gas bubbles that might be mistaken for needles. It might be possible to see Plato lines or twinning planes under magnification and immersion with polarized light. Sometimes heated with borax to created fingerprint like inclusions to mask curved striae. Stones might show colorless areas and uneven color distribution.

Luster

Subadamantine To Vitreous

Stability

Very Good

Fracture

Conchoidal

Cleavage

None, May Show Parting On Twinned Stones

Comments

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