"How to Identify Authentic Sapphire: Blue Gemstone Appraisal"

Sapphires are one of the most popular and sought after gemstones due to their deep and rich blue color. However, not all sapphires are created equal and some are even imitations or treated stones. As a result, it is important to be able to identify authentic sapphire before making a purchase or getting a gemstone appraisal. In this article, we will discuss how to identify authentic sapphire through various characteristics and tests.

1. Color: The first and most obvious characteristic of an authentic sapphire is its unique blue color. The color should be vivid and deep, with a strong saturation that is not too dark or too light. Some sapphires can also have secondary hues, such as violet or green, but these should not be too dominant.

2. Clarity: The clarity of sapphires can vary widely due to the presence of inclusions or internal flaws. However, authentic sapphires should have a degree of transparency that allows light to pass through and create a brilliant sparkle. In general, the less visible inclusions a sapphire has, the higher its value will be.

3. Cut: The cut of a sapphire can greatly affect its appearance and value. A well-cut sapphire should have good symmetry, proportions, and a smooth surface. The facets should also be cut at precise angles to maximize the gemstone's brilliance and minimize any potential light leakage.

4. Hardness: Sapphires are one of the hardest gemstones, with a rating of 9 on the Mohs Hardness Scale. This means that they should not scratch easily and can be cleaned with most jewelry cleaners or cloths. If a sapphire appears to be scratched or damaged easily, it may not be an authentic stone.

5. Heat Treatment: Many sapphires undergo heat treatment to enhance their color and clarity. While this treatment is common and generally accepted in the gemstone industry, it can also affect the value and authenticity of a sapphire. If a sapphire has been heat treated, it should be disclosed and properly priced accordingly.

6. Origin: The origin of a sapphire can also affect its value and authenticity. Sapphires from certain regions, such as Kashmir or Burma, are highly sought after and can command a higher price. However, this information should also be disclosed and properly documented to ensure the sapphire is authentic.

In addition to these characteristics, there are also various tests that can be done to identify authentic sapphire. These tests include:

1. Magnification: Using a loupe or microscope, the gemstone can be examined for inclusions, color zoning, and growth patterns that are indicative of sapphire.

2. Refraction: Sapphires have a high refractive index, which means that light passing through the gemstone will bend at a greater angle. This can be tested using a refractometer.

3. UV Light: Authentic sapphires will fluoresce under UV light, showing a weak to strong reaction.

In conclusion, identifying authentic sapphire requires a combination of careful examination, research, and testing. By understanding the various characteristics and tests used in gemstone appraisal, buyers can make informed decisions and ensure they are purchasing an authentic sapphire.