Types of Diamond Testers: Which One is Right for You?

Diamonds are one of the most precious and valuable gemstones in the world. Diamond testers are used to determine if a diamond is real or not. There are different types of diamond testers available in the market which use various testing methods. Each type of diamond tester has its advantages and disadvantages, and choosing the right one can be tricky. 

Thermal Conductivity Testers

Thermal conductivity testers are the most commonly used diamond testers. These testers work by measuring the diamond's ability to conduct heat. A small metal tip is heated to a specific temperature and placed on the diamond's surface. If the diamond is real, it will conduct heat quickly, causing a significant drop in temperature on the tip. On the other hand, if the diamond is fake or made from another material, it will not conduct heat as well, and there will be no significant drop in temperature.

Advantages:

• Thermal conductivity testers are easy to use and provide quick results.
• They are relatively affordable.
• They are portable and can be taken to various locations.

Disadvantages:

• These testers may give false readings in some cases, such as when testing synthetic diamonds or diamonds coated with heat-conductive material.
• The tester may require calibration for accurate results.
• The tester may not work well with diamonds that have poor thermal conductivity.

Electrical Conductivity Testers

Electrical conductivity testers work by measuring the diamond's ability to conduct electricity. A small metal tip is placed on the diamond, and a low voltage is passed through it. If the diamond is real, it will conduct electricity, and the tester will indicate a positive reading. If the diamond is fake or made from another material, it will not conduct electricity, and the tester will show a negative reading.

Advantages:

• Electrical conductivity testers are accurate and reliable.
• They can detect synthetic diamonds and diamonds coated with heat-conductive material.
• They can measure the size of the diamond.

Disadvantages:

• These testers are expensive and may not be affordable for everyone.
• They are usually not portable and can be heavy or bulky.
• The tester may require calibration for accurate results.

Ultraviolet Fluorescence Testers

Ultraviolet fluorescence testers work by measuring the diamond's ability to fluoresce under ultraviolet light. A diamond with strong fluorescence will fluoresce brightly under ultraviolet light, indicating that it is most likely real. A diamond with weak fluorescence or no fluorescence may be fake or of poor quality.

Advantages:

• Ultraviolet fluorescence testers are accurate and reliable.
• They can detect synthetic diamonds and diamonds with different types of treatments.
• They can provide additional information about a diamond's color and clarity.

Disadvantages:

• These testers are expensive and may not be affordable for everyone.
• They require a dark room to work effectively.
• They may not work well with diamonds that have low fluorescence.

Moissanite Testers

Moissanite testers are used to distinguish between moissanite and diamond. Moissanite is a diamond simulant that is often used as a cheaper alternative to diamond. Moissanite testers work by measuring the electrical conductivity of the stone. Moissanite has a higher electrical conductivity than diamond, and the tester will indicate a positive reading if the stone is moissanite.

Advantages:

• Moissanite testers are accurate and reliable.
• They are affordable and easy to use.
• They can distinguish between moissanite and diamond.

Disadvantages:

• Moissanite testers cannot determine if a stone is a real diamond or a fake one made from other materials.
• They may require calibration for accurate results.
• They may not work well with other diamond simulants.

Choosing the right diamond tester depends on your needs and budget. Thermal conductivity testers are suitable for testing real diamonds, while electrical conductivity testers are more accurate and can detect synthetic diamonds. Ultraviolet fluorescence testers provide additional information about a diamond's color and clarity, while moissanite testers are suitable for distinguishing between diamond and moissanite. Consider your needs and budget before choosing a diamond tester, and don't forget to consult with a professional appraiser for accurate results.