Irradiation
Irradiation treatments involve exposing the stone to electromagnetic rays (ionizing radiation) or gamma rays (cobalt 60 radiation) to release electrons from their normal location, ...
Irradiation is commonly used to alter the color diamonds, usually to produce gems with more desirable colors in hues of blue green brown orange a very dark green and also yellow colors.
IRRADIATION
Irradiation is the act of being exposed to radiation. Many stones (like kunzite) are irradiated in order to enhance their color. Being irradiated changes the crystal structure of the mineral by moving electrons.
Irradiation
Sometimes irradiation an uncommon treatment is used to get unusual colors like clear green or dark/black smoky quartz. This process involves penetrating material with subatomic Gamma rays.
Irradiation: The process of bombarding a gemstone with X-rays, gamma rays or streams of subatomic particles in order to change the stone's color.
Ivoride: See French Ivory.
Ivorine: See French Ivory.
Irradiation of diamonds using a nuclear reactor or linear accelerator, sometimes in combination with heating, is used to produce a variety of different fancy colored stones.
Irradiation
I = Irradiation: Alteration of color via the use of neutrons, gamma, ultraviolet and/or electron bombardment. A heating process may follow irradiation. Example: Irradiated blue topaz
Coating ...
Irradiation Exposing gemstones to radioactive rays from x-rays or other material to change or enhance the original color. Blue topaz is always irradiated, for example.
Irradiation - A gemstone enhancement process, irradiation uses high energy, sometimes followed by heating, to alter gemstone color. Diamonds are sometimes irradiated to produce or enhance various colors.
Irradiation: The process of exposing diamonds or gemstones to a radioactive substance that alters the colour. Blue topaz is routinely irradiated to enhance the colour, and some fancy colour diamonds are irradiated, especially those from the 1960s.
Irradiation: ( AGTA Code = R) After heating, the most commonly used treatment for gem enhancement is irradiation.
IRRADIATION
The process of exposing gemstones and minerals to radiation to enhance their colour.
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R Irradiation
Applying radiation in order to enhance the color of a gemstone by changing the electron dispersion within the stone's crystalline structure. The enhancement is typically combined with heat treatment.
Irradiation means pounding a material with subatomic particles. In some cases, irradiation is followed by heating to produce a better color of the gem .Today, many irradiation techniques are applied.
Irradiation
Country of Origin
Madagascar, Brazil, Afganistan, U.S.
Spodumene Care
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Irradiation may produce pink or deeper pink colours from colourless to pink varieties of spodumene
Kunzite's colour, including irradiated colour, is susceptible to fading upon prolonged exposure to light ...
Irradiation: The use of neutrons requiring an environmental safety release from the Nuclear Regulatory Commission (NRC), Gamma and/or electron bombardment to alter a gemstone's color. The irradiation may be followed by a heating process.
U ...
Irradiation - A treatment done on pearls and some colored stones for color enhancement that is not always permanent and must be stated on your bill of sale.
Irradiation 101 - A refresher course
Our reader in Thailand urged that, in addition to irradiated topaz, “let’s not forget, the following are regularly irradiated as well: ‘green’ amethyst, citrine, fluorite, heliodor, kunzite, ...
Irradiation is a permanent process in which gemstones are exposed to radiation usually to improve color. Irradiation is commonly used on yellow beryl, smoky quartz, freshwater pearls, diamonds, blue topaz and pink to red tourmaline.
Diffusion ...
Irradiation
A process of using x-rays to change the body color to creates a 'fancy color' diamond.
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Irradiation is a treatment used to alter or improve the color of gemstones. The process makes use of various high-energy atomic particles. Irradiation is often followed by annealing (heating) for stabilization or further improvement of color.
The irradiation process of the diamond was accomplished between the years 1955 to 1971. The Deepdene had been subject to irradiation process probably by neutron bombardment.
Heat, irradiation, dying, bleaching and oiling are among possible treatments that enhance gemstone color.
Colors often form due to natural irradiation or the presence of rare earth elements. This clear to opaque stone will sometimes show a cat's-eye effect.
1 out of every 3 diamonds sold in the United States has been treated to some degree, including doublets, coating, and irradiation.
Some light blue sapphire also turns orange after irradiation. This process is not stable and the color produced by this method can fade in light or heat. This is not acceptable. Irradiation is detected by conducting a fade test.
Color can be induced or changed by irradiation and/or heating. Bombardment by high energy particles (electrons, neutrons, protons, gamma rays, alpha particles) is known to change pale yellow stones to fancy blue, green, brown, orange, ...
Heat will mutate the irradiation process and cause irreparable harm to the stone. It is also wise to note that if you have any question about a diamonds enhancements, to set it afterwards.
Irradiation with a cyclotron, introduced in the mid-1900s, produces green, blue-green, or blue coloured diamonds. However, diamonds irradiated with a cyclotron can show colour zoning, or uneven distribution of colour.
Yellow sapphires can be colored without high temperature heating through a method of irradiation.
The beginnings of diamond coloring by artificial irradiation go back to scientific experiments carried out in 1904 by the Englishman, William Crookes, with radioactive metal radium.
Dyes, heat treatment, and irradiation are sometimes applied to produce a wide range of hues such as yellow, green, blue, purple, gray, and black in freshwater and Akoya cultured pearls.
However, that doesn't stop the marketing of these less valuable pale Amethyst stones after irradiation and/or heat treatments turn the color green.
Though fancy colored diamonds rarely occur in nature, laboratories can easily create them through irradiation and heating. This process can permanently turn a natural colorless diamond into a fancy in a wide range of colors.
The popular icy pastel blue color is created by exposing colorless topaz to irradiation and then heat. Lighter colors are created by electrons and the darker blue known as London or Super blue is created by exposure to neutrons.
This natural colouring is normally the result
of irradiation of the quartz from associated minerals
or from those occuring in the host rock.
However, quartz can also be tinted smoky
by man-made irradiation and heating techniques.
Irradiation: Irradiation is a color change inducing process. Gemstones of poor color can be irradiated to intensify their color. The technique is widely used as a treatment for blue topaz.
J ...
The most common form of irradiation diamonds chance into is through bombardment by alpha particles which are present in uranium compounds or percolating groundwater.
Most blue topaz available today is helped along by man with the application of irradiation and heat.
They do this by treating the less desirable diamonds with irradiation followed by intense heat. This amazing process turns brown and yellowish diamonds into beautifully colored diamonds that you can afford.
A natural diamond that is treated by the irradiation process to enhance the color to blue. Although millions of years old, diamonds are the hardest substance known to mankind, and are made from highly compressed carbon molecules.
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Smoky quartz is a transparant brown to black variety of quartz caused through the natural (or artificial) irradiation of aluminium containing rock crystal. Cairngorm is a variety of smoky quartz found in the Cairngorm Mountains of Scotland.
Today we also have blue topaz, which has a pale to medium blue color created by irradiation. Pale topaz which is enhanced to become blue is found in Brazil, Sri Lanka, Nigeria, and China.
A diamond with a bodycolor induced by some form of artificial irradiation, often in conjunction with controlled heating (known as annealing).
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Enhancements
A special irradiation process produces this lively orange color in beryl.
More information on gemstone enhancements.
Orange Beryl ...
The improvement of a diamond's colour by irradiation, HPHT (High Pressure, High Temperature), or coating (undesirable).
Coloured
Fancy coloured diamonds are rare, attractive and valuable.
Color enhancement is the improvement process of a gemstone's color mainly by irradiation and HPHT (High Pressure, High Temperature).
Composite Gemstone
It refers to a gemstone which is assembled from several pieces, often used to imitate a gem.
cyclotron The first of the irradiation methods to emerge in the early 1940s to change or enhance the color of a diamond.
cz See cubic zirconia.
Organic liquids such as mixtures of anthracene in benzene or toluene, or stilbene in the same solvents, fluoresce with ultraviolet or gamma ray irradiation.
Colored diamonds are typically treated with irradiation and heat to accomplish the color necessary. Often, color makes the diamond more valuable. Color is graded on a normal diamond color scale.
The original color of some kunzite stones can be restored or even intensified by irradiation. It is usually used as a large stone and is easily chipped; small stones of kunzite are difficult to cut. Kunzite is often used in pendants.
Any stone that has been changed in appearance, particularly in color, by an artificial process; heating, irradiation, and dyeing are some of the processes used to change gemstone appearance.
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Gemologists can create fancy color diamonds by manipulating less desirable diamonds to alter their colors. Irradiation, followed by a high heat treatment, can turn brownish and pale yellow diamonds into richly colored, affordable gems.
Smoky quartz is a translucent grayish/brown quartz with natural irradiation. Smoky quartz can occur as secondary quartz crystals on cryptocrystalline quartz like agate.
Any treatment process that enhances or changes the color of a gemstone. This may include heat-treating, irradiation, dying, bleaching, oiling, to name a few.
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Enhanced stones are stones that have been treated to improve their color, clarity, finish, strength, or other characteristics. Some common enhancements are heat-treatment, irradiation, coating the surface, filling cracks, oiling, ...
Treated Diamonds: A diamond with a body color induced by some form of artificial irradiation, often in conjunction with controlled heating (known as annealing).
Any post-recovery process which alters the appearance, especially the colour or clarity of a natural diamond or other gem material. Coating, fracture filling, irradiation, heating (annealing) and lasering are all forms of enhancement.
Any treatment process that enhances or changes the color of a gemstone. Common treatments include but are not limited to heat-treating, irradiation, dying, bleaching, and oiling.
Comfort Fit: ...
 See also: Color, Stone, Jewel, Gemstone, Diamond
  
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