A gemstones "enhancement" or sometimes called "treatment" is defined as any process, other than cutting and polishing, that improves the appearance (color & clarity), durability, or value of a gem. The methods of treating a stone may be as simple as "heating" or very complex like "irradiation." Some enhancements are easily detected and others are nearly impossible to detect without specialized equipment.

We, at KashmirBlue, take enhancement disclosure very seriously not only because the FTC guidelines suggest so, but because enhancements may dramatically affect the price and or your health. We guarantee, to the best of our abilities, to provide our customers with complete information regarding any and all enhancements and state so on the invoice.

Some enhancements are permanent while others are less stable, meaning the appearance may change over time. In the event that we offer a gem with less than very good stability, we will ensure you are aware of the special care needed for that stone. In addition, it is our policy to steer clear of artificially enhanced gems such as bulk or beryllium diffusion and other similarly controversial treatments.


Our guidelines and nomenclature are identical to what most respectable laboratories use and are as follows:

None, Not Enhanced, Natural Color (N): This symbol or words indicate that the gemstone is not currently known to be enhanced or subject to any enhancements. This can be proven via gemological laboratory or other methods. This nomenclature guarantees the gem in question or your money back.

Normally Enhanced (E): This symbols or words indicate that the gemstone is routinely enhanced and impractical to prove otherwise. To assume such enhancements were applied protects both the buyer and seller. If gemological evidence suggests a more specific method of enhancement, it will be mentioned by code.

Heating (H): The use of heat under controlled conditions to improve or remove color, clarity, and or phenomena. In most cases, the result of heat treatment is permanent and widely used. (Examples: Tanzanite, Ruby, Sapphire, and Aquamarine)

Irradiation (R): The use of energy particles or electromagnetic waves to alter a gemstone's color. In some cases the effect of radiation can be unstable and reversed by heating.

Filling (F): The filling of a surface-reaching cavity, pits, fissures, fractures, or other voids with a foreign substance to improve durability, appearance or add weight. (Example: Ruby)

Oiling / Resin Infusion (O): The filling of a surface-reaching cavity, fissure, fractures or other voids with wax, resin, oil or other colorless substances to improve the gemstone's appearance. (Example: Emerald)

Dyeing (D): Introducing colored matter into a gemstone to give it new color, improve color, or even color. (Example: Jade) (*Note: We do not sell gemstones with this particular treatment)

Diffusion, Bulk Diffusion (BD): The process of using high temperature in combination with chemicals to artificially produce a thin layer of color and or asterism. (Example: Diffused Sapphire) (*Note: We do not sell gemstones with this particular controversial treatment)


Gemstone Type Enhancement Stability Care Requirements
Alexandrite None (N) Excellent Normal
Amber Usually Heated (H) or Dyed (D) Very Good Special Care May be Required
Amethyst None (N) or Occasionally Heated (H) Good Special Care May be Required
Ametrine None (N) Excellent Normal
Andalusite None (N) Excellent Normal
Aquamarine Usually Heated (H) or None (N) Excellent Normal
Beryl  (Emerald) Commonly Oiled (O) Very Good Special Care May be Required
None (N) Excellent Normal
Chrysoberyl Seldom Irradiated (I) or None (N) Excellent Normal
Citrine Usually Heated (H) Good Special Care May be Required
Chrome Diopside None (N) Excellent Normal
Garnet None (N) Excellent Normal
Iolite None (N) Excellent Normal
Jade Occasionally Dyed (D) Variable Special Care May be Required
Commonly Oiled (O) Variable Special Care May be Required
Kunzite Usually Heated (H) or Irradiated (I) Good Special Care May be Required
Opal Seldom Oiled (O) or Dyed (D) Variable Special Care May be Required
Peridot None (N) Excellent Normal
Ruby Usually Heated (H) Excellent Normal
Commonly Filled (F) Very Good Normal
Rarely Diffused (BD) Good Special Care May be Required
Occasionaly None (N) Excellent Normal
Sapphire Usually Heated (H) Excellent Normal
Rarely Diffused (BD) Good Special Care May be Required
Occasionaly None (N) Excellent Normal
Spinel Rarely Heated (H) or None (N) Excellent Normal
Tanzanite Usually Heated (H) Excellent Normal
Topaz     (Blue) Usually Irradiated (I) or Rarely Diffused (BD) Variable Special Care May be Required
    (Reds & Pinks) Heated (H) Excellent Normal
    (Yellow & Orange) None (N) Excellent Normal
Tourmaline
      (Blues, Greens)
Commonly Heated (H) Excellent Normal
      (Chrome Green) None (N) Excellent Normal
      (Reds, Purples) Commonly Heated (H) and Occasionaly Irradiated Excellent Normal
Zircon Occasionally Heated (H) Variable Special Care May be Required
NOTE* (The treatments listed above are by no means all-inclusive but instead most common to the particular gemstones we deal in. Please call or write for additional information or special care requirements)