Gemstone Treatments

Many gemstones undergo treatments to enhance their beauty and durability. While some treatments are industry-accepted, others can affect the gemstone’s value and longevity.

Common Gemstone Treatments

Heat Treatment

This is the most common treatment used to enhance the color and clarity of sapphires, rubies, and other gems. Heat treatment is widely accepted in the industry.

Irradiation

Used to intensify or alter the color of gemstones such as topaz and diamonds. The color change is usually permanent.

Dyeing

Some porous stones, like jade and turquoise, are dyed to enhance their natural colors. Buyers should be cautious as dyes can fade over time.

Coating

A thin layer of material, such as metallic oxides, is applied to gemstones to enhance their appearance. This treatment is often used for quartz and topaz.

Fracture Filling

Rubies and emeralds with visible cracks are sometimes filled with glass or resin to improve clarity. This treatment can affect the gem’s durability.

How to Identify Treated Gemstones?

Identifying treated gemstones is vital for assessing their authenticity and value. A certified gemological report from reputable labs like GIA or ICA can confirm any treatments. Visual inspection under a jeweler’s loupe can reveal surface coatings, color inconsistencies, or air bubbles. Some treatments, like heat or dyeing, may also cause fluorescence under UV light. Natural inclusions differ from the patterns seen in treated gems. For accurate identification, consulting a certified gemologist is recommended.

Ask for certification from a reputable gem lab.

Use a jeweler’s loupe to examine the stone for unnatural inclusions or color enhancements.

Be cautious of stones with extremely vibrant colors at suspiciously low prices.

Understanding gemstone treatments helps buyers make informed decisions. Whether you seek a natural, untreated gemstone or a treated one at a lower price, knowing the implications of these enhancements ensures a fair purchase.