Recommended Diamond Grading Tools for Novices


The Basics

To identify and grade diamonds, whether as a professional or hobbyist, you’ll need tweezers, a loupe, a microscope, and the right lighting. Two other very important pieces of equipment you’ll need are a spectroscope and a refractometer. You can learn about other gemology tools here.

For Authenticity, Purchase a Diamond Tester

The diamond tester is a simple electronic device that can distinguish between a natural diamond and a simulant. Generally speaking, they tend to provide accurate results regarding the authenticity of a diamond. However, there are exceptions. Since they rely on thermal conductivity, they may mistake a synthetic moissanite for a natural diamond. Let’s explore this a little further.

How Does a Diamond Tester Work?

A diamond tester works by measuring the rate at which heat passes through a stone. This is thermal conductivity. If you place the tip of the tester on the stone, it will measure the thermal conductivity and give you an electronic reading. Recall that natural diamonds have very high thermal conductivity. (Their capacity to conduct heat is one reason they’re used in manufacturing). Therefore, measuring thermal conductivity with a diamond tester works well for distinguishing between …

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Content Length 1526 words
Reading time 7 min 38 sec

Here's what you get if you unlock this article:

  • The Basics
  • For Authenticity, Purchase a Diamond Tester
    • How Does a Diamond Tester Work?
    • Do You Need a Moissanite Tester?
    • Other Diamond Simulants and Synthetics
  • For Grading Diamond Color, Purchase a Set of Master Stones
    • Why Professionals Should Buy Natural Diamond Master Stones
    • Buying or Building a Natural Diamond Masters Set
      • Size Matters
      • Find a Diamond Dealer
      • Think About Resale
      • Buy Strategically
      • Budget for Lab Fees
      • Are You Traveling With Your Diamond Masters?
    • Choosing a CZ Masters Set

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