Step 3: Practical Gemology
You can use an electronic scale for calculating specific gravity if you have the right accessory, a hanging basket for measuring the weight of gems in water. We’ll take you through the testing process step-by-step.
Step 1: The Equipment
Step 2: Measuring Dry Weight
Step 3. Measuring Weight in Water
Step 4: Calculating Specific Gravity
The formula for calculating the specific gravity of a gem is: