Flux Healed Or Infilled Ruby | Gemopedia

Flux healed ruby has been heat treated with flux material that heals natural fissures within the stone. The process leaves flux residues, but only minor when compared to infilling or lead glass treatments.
Colors
Orangy Red, Red, Purplish Red

Flux Healed Or Infilled Ruby Classification

Common Name

Flux Healed Or Infilled Ruby

Species

Corundum

Variety

Flux Healed Or Infilled Ruby

Colors

Orangy Red, Red, Purplish Red

Alternate Names

Gemstone Groups

Key Separations

magnification, RI, birefringence, pleochroism

Comments

During heat enhancement, fluxes may be used to heal natural fissures. The process leaves glass residues, but minor when compared to infilling or lead glass treatments. The filling of surface-breaking cavities or fissures with colorless glass or fluxes during the heat treatment process. Improves clarity and color, and it may possibly add weight. Lead is not present in these materials.

Flux Healed Or Infilled Ruby Optical Properties

Transparency

Transparent - 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 strong red
LWUV: Weak to moderate red

CCF Reaction

red

Pleochroism

Dichroic, strong orangy red and purplish red

Dispersion

Strength: moderate fire Value: 0.018

Comments

Flux Healed Or Infilled Ruby Chemistry & Crystallography

Chemical Name

aluminum oxide

Chemical Formula

Al2O3

Synthesis

Crystal System

Trigonal

Classification

Oxide

Nature

Natural

Crystallinity

Crystalline

Comments

Flux Healed Or Infilled Ruby Characteristic Physical Properties

Hardness

9

Streak

White

Specific Gravity

3.95-4.1 Typical:4

Toughness

Excellent

Inclusions

Surface reaching fractures and cavities of the stone are filled. One might be able to see flash colors in infilled stones. There is a difference in luster between ruby and glass areas of the stone. Stones will show evidence of heat treatment with damaged mineral inclusions. Sometimes stones have silk, rutile, boehmite, apatite, calcite or zircon crystals. Fingerprint and negative crystal inclusions. Hexagonal growth and color zoning. Heat treated stones will have fracture halos, discoid fractures or snowballs around crystal inclusions Silk will be broken and might show sintered areas especially around the girdle.

Luster

SubAdamantine

Stability

Very Good

Fracture

Conchoidal

Cleavage

None

Comments

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