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The most common treatments applied to gemstones to enhance beauty and durability
Precious stones have fascinated mankind for centuries, prized for their brilliance, color and rarity. However, to bring out their true beauty and ensure their durability, many of these stones go through various treatments. These procedures are essential in the jewelry industry and are used to correct or enhance the natural characteristics of stones. Next, we will explore the main treatments applied to some of the gemstones and their importance.
1. Heat treatment
One of the most common treatments is thermal. This method involves heating the stone to high temperatures to alter its color and clarity. For example, sapphires and rubies are often heat-treated to intensify blue or red hues. This process can remove visible inclusions and make the stone more attractive. The heat treatment is considered stable and permanent, without compromising the durability of the stone.
2. Oil treatment
Oil treatment is commonly used for emeralds. Emeralds often have natural inclusions and cracks that can be filled with special oils to improve the clarity and overall appearance of the stone. This method is not permanent and may require periodic re-treatment, but it is accepted in the gemological industry, being considered a traditional practice.
3. Diffusion treatment
Diffusion treatment involves introducing chemical elements into the stone at extremely high temperatures. These elements penetrate the surface, changing the color. A common example is the treatment of sapphires to achieve shades of deep blue or orange. Diffusion can produce vibrant and even colors, but it is important that this method is disclosed to the buyer because the color is not natural.
4. Irradiation treatment
Radiation treatment is used to change or intensify the colors of stones. For example, topaz can be irradiated, generally with X-rays, to achieve intense shades of blue. Although this treatment has been performed for decades, it is stable, there are no reports or information of possible risks for the owners of stones treated by irradiation. However, for safety reasons, the stones may require a "storage" period of at least three months to ensure that there is no possible health risk before they are sold.
5. Treatment with polymers
Some stones, such as opals or emeralds, can be treated with polymers to fill cracks and improve durability. This method helps to stabilize the stone and prevent deterioration. Polymer treatment can also improve the overall appearance of the stone, making it more attractive.
6. Laser treatment
Laser treatment is mainly used for diamonds. This method involves using a laser to create small channels in the stone, which allow the inclusions to be removed using chemical solutions. The result is a diamond with improved clarity, although channels created by the laser may be visible upon close examination.
The importance of transparency in the disclosure of treatments applied to precious stones
It is not mandatory for all precious or semi-precious stones to be treated. High quality natural crystals that meet color and clarity standards are just polished and that's it, no enhancement required.
Where these treatments exist, it is essential that they are disclosed to buyers. Transparency in these practices ensures trust and integrity in the jewelry industry. Buyers must be informed about the type of treatment applied, its durability and whether it requires special care.
In conclusion, the treatments applied to gemstones play a crucial role in enhancing their appearance and durability. From heat treatment to oil treatment and radiation, each method has its specific purpose and contributes to the transformation of stones into remarkable jewelry. Transparency and correct consumer information remain fundamental to maintaining high standards in this fascinating industry.