It is sometimes observed that citrine is sold as Brazilian topaz!Note that when quartz stone is heated, it can change color and produce imitation green, yellow and other colors and hear it in the market as the original and natural topaz
Irradiation is a common treatment used to change or enhance the color of topaz. The Gemstone is exposed to high-energy radiation, typically in the form of gamma rays or electrons. This process can transform colorless or pale Topaz into shades of blue, from light sky blue to deep Swiss blue. Irradiation can also be used to produce golden or orange hues in yellow topaz. Heat treatment is another method used to alter the color of topaz. Heating the gemstone at specific temperatures can remove color zoning or modify the existing color. Heat treatment is often used to produce pink topaz from pale or colorless crystals.
Coating is a temporary treatment used to create certain effects or enhance the color of topaz. A thin layer of colored film or vapor is applied to the gemstone's surface, which can alter its appearance. Coatings can create iridescent or rainbow-like colors on the surface of topaz. It's important to note that treated topaz should always be disclosed and clearly identified when sold. Gemstone professionals and reputable jewelers should provide accurate information about any treatments applied to the gemstone.
Additionally, it's worth mentioning that natural topaz, without any color enhancement treatments, is also highly valued in its pure form. The natural color variations of topaz, such as the golden hues of imperial topaz or the vibrant blue of certain varieties, are cherished by many collectors and Jewelry enthusiasts.
- Heating: The purpose of this work is to create a pink (in nature rare) color from Stones that are yellow, orange, or brown. This color change is durable and does not change color. It is impossible to detect.
- Irradiation: The purpose of this method is to produce dark blue topaz Rocks because in nature this mineral is found in pale blue. This color change is as durable as the above method and its color does not change, it is usually indistinguishable.
- Diffusing color on the surface of the Stone (Diffusion): The purpose of this method is to produce different colors such as red, green, and blue. It is not durable because the color can be detected on the surface of the stone.
- Surface coating: The purpose of this method is to produce rainbow colors for fire topaz. This method is not durable and can be detected by scratching the surface of the stone.
Stones that look like topaz are artificial sapphire, blue glass, artificial spinel. Sometimes, topaz is mistaken with stones such as citrine, aquamarine, tourmaline, brown quartz (smoky quartz). It is sometimes observed that citrine is sold as Brazilian topaz! Note that when quartz stone is heated, it can change color and produce imitation green, yellow and other colors and hear it in the market as the original and natural topaz. Golden topaz is usually more expensive and it is better to buy natural topaz. A famous jewel called Braganza weighing in at 1.640 carats was thought to be a large, unique diamond. But later it turned out to be a colorless topaz!
The colorless topaz Gemstones that are mined to turn blue come mainly from Nigeria and Sri Lanka. More than 99% of today's blue topazes are the result of heating a colorless species. There is no” super” or " Swiss” blue garlic in nature. These gemstones first turn brown by coloring into colorless topaz and then become a stable blue color by heat. It is interesting to know that brown topaz loses a significant amount of its color under sunlight. The color of most pink species is created by heat treatment of” cherry” colored stones and they are called “Pinked or Fired Topaz”. The colorless type can be by method Aqua Aura (Gold vapor deposition to coat the green-blue).
