Spinel (Synthetic - Flux) | Gemopedia

One method of creating synthetic spinel is called flux growth. During the flux growth process, flux, a substance that reduces the melting point of surrounding material, is combined, in a metal-lined crucible, with the elements that make up a specific gem mineral. The crucible is heated until its contents are liquid and then it is allowed to cool very slowly. As cooling continues, the gem mineral crystallizes from the solution. Flux grown synthetic gems can take up to a year to grow to a facetable size, but the exceptional clarity of these gems is well worth the wait! Synthetic gems have the same chemical, optical, and physical properties of their natural counterparts, but are a more cost-effective alternative to a natural gem.
Alternate
Names
Flux-Grown Synthetic Spinel, Alumag, Corundolite, Lustergem, Magalux, Radient, Strongite ,Wesselton, Simulated Diamond, Aquagem, Rozircon, Berylite, Dirigem, Perigem, Emerada, Erinide
Colors
Slightly Purplish Red, Medium Dark To Dark Blue, Very Slightly Violet Blue

Spinel (Synthetic - Flux) Classification

Common Name

Spinel (Synthetic - Flux)

Species

Spinel

Variety

Flux-Grown Synthetic Spinel

Colors

Slightly Purplish Red, Medium Dark To Dark Blue, Very Slightly Violet Blue

Alternate Names

Flux-Grown Synthetic Spinel, Alumag, Corundolite, Lustergem, Magalux, Radient, Strongite ,Wesselton, Simulated Diamond, Aquagem, Rozircon, Berylite, Dirigem, Perigem, Emerada, Erinide

Gemstone Groups

Key Separations

Magnification, spectrum and RI

Comments

Colorless variety trade names: Alumag, Corundolite, Lustergem, Magalux, Radient, Strongite ,Wesselton, Simulated Diamond. Colored variety trade names: Aquagem, Rozircon, Berylite, Dirigem, Perigem, Emerada, Erinide. Misnomers: Brazilian Emerald, synthetic aquamarine, synthetic birthstone varieties, synthetic peridot, Hope Sapphire, Jourado Diamond.

Spinel (Synthetic - Flux) Optical Properties

Transparency

Transparent - Opaque

Refractive Index

1.719
Tolerance:(+0.003/-0.003)

Birefringence

Optic Character

NA

Optic Sign

NA

Polariscope Reaction

Singly Refractive (SR) With ADR

Fluorescence

SWUV: Variable
LWUV: Variable

CCF Reaction

Blue: red to orangy red

Pleochroism

None

Dispersion

Strength: weak fire Value: 0.02

Comments

Spinel (Synthetic - Flux) Chemistry & Crystallography

Chemical Name

magnesium aluminum oxide

Chemical Formula

MgAl2O4

Synthesis

flux growth

Crystal System

Cubic

Classification

Oxide

Nature

Synthetic

Crystallinity

Crystalline

Comments

Spinel (Synthetic - Flux) Characteristic Physical Properties

Hardness

8

Streak

Specific Gravity

3.58-3.64 Typical:3.61

Toughness

Varies

Inclusions

Flux-grown spinel typically has flux residue inclusions that can be orangy brown to black in color. Some flux inclusions are singular but others can be mistaken for fingerprint inclusions. Stones might contain metallic platelets from the platinum crucible. Dark blue stones might show a red flash under penlight due to cobalt coloring agent.

Luster

SubAdamantine

Stability

Very Good

Fracture

Conchoidal

Cleavage

None

Comments

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