Shinjyu Jewelry Company - Arden Arcade, Sacramento 95825

Methods of Enhancing a Ruby

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The rubies that you have or are thinking about buying will probably have some sort of enhancement. You should be aware of the type of treatment, the stability of that treatment and the care you should give such treated rubies.

Type of Enhancement

HOW OFTEN USED

STABILITY

CARE REQUIRED

Heat Treatment
Quite Often
Accepted Industry Practice
Good
Requires Normal Care
Dye
Rarely
Poor
Requires Very Special Care
Irradiation
Rarely
Unknown
Requires Normal Care - as far as is known.
Filling with colored glass,
plastic, or solidified borax (see note below)
Commonly Done
Good to Poor
Requires Very Special Care
Diffusion (Use of chemical and high heat)
Done Occasionally
Good to Fair
Requires Special Care

Note: Lead-glass filled "rubies" have appeared on the market in large quantities. The American Gemological Laboratories will term such treated material as "composite ruby". The stability of this material is so poor that it will be easily etched with ordinary household solvents.

You may be able to examine your rubies and detect some treatment such as dyeing and filling. A local gemologist will be able to identify other treatments. Some require the services of a gemstone laboratory.

Ruby, July's Birthstone

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