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This article was co-written by Kennon Young. Kennon Young is a GIA graduate gemologist and JA jewelry technician. He received the highest certification in the jewelry appraisal industry, the ASA Gemologist in 2016.
There are 11 references cited in this article that you can view at the bottom of the page.
This article has been viewed 3,563 times.
Rough diamonds are diamonds that have not been cut. To see if the stone in your hand is a diamond, you can make a quick visual assessment to rule out other gems. You can then perform more precise tests with corundum or an electronic diamond tester. You can also perform a gravimetric test of the stone to determine if it is a diamond.
Steps
Do simple tests at home
- Visual inspection is a quick way to rule out other gems but is not an accurate test.
- If you see four edges of the crystal, use other methods to determine for sure it is a diamond.
Diamonds can come in many shapes, but the most common is a pyramid-like 12-sided block whose floors are stacked on top of each other.
Kennon Young
Gemstone Expert
Kennon Young is a GIA graduate gemologist and JA jewelry technician. He received the highest certification in the jewelry appraisal industry, the ASA Gemologist in 2016.
Gemstone Expert
- The Mohs hardness scale ranks minerals based on their hardness. Diamond is ranked 10th on the hardness scale, and corundum is 9th. This explains why it creates scratches when you rub two stones together.
- Diamond testers use electrical and thermal conductivity to determine if a gemstone is a diamond.
- Cheaper diamond testers may not be as accurate as more expensive models.
- Read customer reviews before you buy a diamond tester.
Perform density test
- Some types of electronic scales are more accurate than others. You should look for scales that have at least 2-3 decimal places after a whole number.
- Returning the scale to zero is to determine the density of the diamond without taking into account the weight of the cup and water.
- If you don’t have a plastic cup, you can also use a lightweight Tupperware container or plastic bowl.
- Make sure the container does not protrude beyond the edge of the scale.
- If you let the stone touch the bottom of the cup or the side of the cup, the scale will give an incorrect measurement.
- The weight of the paperclip head is negligible.
- For example, if the stone weighs 12.6 g and its weight in water is 4.8 g, the result of the calculation will be 2.625, which is approximately the density of quartz, not diamond. [9] X Research Source
- If you determine that you do have a diamond, take it to a gemologist.
Implement other test methods
Kennon Young
Gemstone Expert
Kennon Young is a GIA graduate gemologist and JA jewelry technician. He received the highest certification in the jewelry appraisal industry, the ASA Gemologist in 2016.
Gemstone Expert
Diamonds can also be found in water. Diamonds were discovered in the cratons, the oldest base of the earth’s crust. Diamonds can also emerge from cratons and drift with currents, so they are also found in currents or in the ocean at the end of the stream.
- Cut diamonds will have sharp edges.
- Having a diamond assessed is the surest way to determine if a stone is a diamond.
Things you need
Identify rough diamonds
- Corundum
- Diamond tester
Do a gravity test
- Electronic scales
- Glass
- Water
- Paper
- Pen
- Computer
Implement other test methods
- Microscope or magnifying glass
This article was co-written by Kennon Young. Kennon Young is a GIA graduate gemologist and JA jewelry technician. He received the highest certification in the jewelry appraisal industry, the ASA Gemologist in 2016.
There are 11 references cited in this article that you can view at the bottom of the page.
This article has been viewed 3,563 times.
Rough diamonds are diamonds that have not been cut. To see if the stone in your hand is a diamond, you can make a quick visual assessment to rule out other gems. You can then perform more precise tests with corundum or an electronic diamond tester. You can also perform a gravimetric test of the stone to determine if it is a diamond.
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