Thursday, July 18, 2024

4 Proven Methods to Know If a Sapphire Is Real

Sapphires are stunning gemstones that come in various colors, with blue being the most well-known. If you’ve come into possession of a sapphire or are considering purchasing one, you may be wondering how to determine if it is real or not. In this article, we will explore several methods and techniques to help you ascertain the authenticity of a sapphire.

Method 1: Visual Inspection

The first step in identifying a real sapphire is to visually inspect the stone. Consider the following aspects:

  • Color: Sapphires come in a range of colors, including blue, pink, yellow, purple, and green. Blue sapphires are highly coveted, and the intensity and evenness of the color can impact their value. Real sapphires will exhibit rich, vibrant hues with consistent color distribution. Pay attention to any noticeable color zoning or variations within the stone, as these may indicate that it is not a genuine sapphire.
  • Clarity: Like other gemstones, sapphires can have internal characteristics called inclusions. Real sapphires may have some inclusions, which can be seen under magnification. However, exceptionally clear and flawless sapphires are rare and more valuable. Inspect the stone under good lighting and look for any visible inclusions or blemishes.
  • Cut: Sapphires are typically cut to enhance their beauty and brilliance. Look for well-executed cuts that maximize the stone’s sparkle and reflect light evenly. Real sapphires will have precision-cut facets and proper proportions.
  • Luster: Real sapphires have a distinct luster that is different from other gemstones. They exhibit a silky sheen or a vitreous (glass-like) luster. If the stone appears dull or lacks a characteristic sapphire luster, it may not be a genuine sapphire.

Method 2: Hardness Test

Sapphires are one of the hardest gemstones, measuring 9 on the Mohs scale of mineral hardness. This means they are highly scratch-resistant and can only be scratched by a diamond, which has a hardness of 10. Conducting a hardness test can help determine if a stone is a real sapphire. Here’s how:

  • Find an unglazed ceramic tile or a piece of glass.
  • Take the sapphire and try to scratch the surface of the tile or glass with it.
  • If the sapphire leaves a scratch or shows no signs of damage, it is likely a genuine sapphire. However, if the stone gets scratched or damaged, it may not be a real sapphire, as other materials like glass or synthetic gems are not as hard.

Method 3: Thermal Conductivity Test

Sapphires have high thermal conductivity, meaning they can quickly conduct heat. This characteristic can help differentiate them from imitations or other gemstones. Follow these steps to conduct a thermal conductivity test:

  • Obtain a small metal object, such as a paperclip or a coin.
  • Hold the metal object in your hand for a few minutes to allow it to reach body temperature.
  • Touch the sapphire with the metal object for a few seconds.
  • Immediately after removing the metal object, lightly touch the sapphire with your fingertip.
  • If the sapphire feels cold to the touch, it is likely a real sapphire. Synthetic or fake sapphires usually do not exhibit the same degree of thermal conductivity and will not feel cold.

Method 4: Seek Professional Evaluation

If you are still uncertain about the authenticity of your sapphire, it is best to consult a professional gemologist or a reputable jeweler. These experts have the knowledge and tools to accurately determine if a sapphire is real or synthetic. They can perform advanced tests, such as spectroscopy or refractometry, to analyze the stone’s properties and confirm its authenticity.


Determining if a sapphire is real requires a combination of visual inspection, hardness testing, thermal conductivity testing, and sometimes seeking professional evaluation. Real sapphires will exhibit vibrant colors, have clarity characteristics, display a high level of hardness, and demonstrate thermal conductivity. Remember to purchase gemstones from trusted sources and always request certification or documentation to ensure the authenticity of your sapphire. By following these guidelines, you can have confidence in the genuineness of your sapphire and enjoy its beauty and value for years to come.

Related Articles

Latest Articles