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What Are
Diamond Simulants
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A diamond simulant is a manufactured stone that is meant to mimic the appearance of a diamond. Simulants are made using a wide variety of materials, so they are not chemically identical to mined diamonds. This means that they will not have the same durability, brilliance, and color of a traditional diamond.

Diamond simulants and lab-created diamonds often get mixed up, but they’re completely different. Lab grown diamonds comes in no way of diamond simulants! A diamond simulant is not a diamond at all, because the chemical properties are completely different.

They can be made out of anything from glass to cubic zirconia. While they may look similar at first, diamond simulants aren’t as hard and don’t have the same optical properties as diamonds, so they’ll show signs of wear and won’t be as sparkly.

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Lab Grown Diamond

✅ Real Diamonds

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Natural Diamond

✅ Real Diamonds

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Cubic Zirconia

❌ Not Real Diamonds

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Moissanite

❌ Not Real Diamonds

Properties Diamonds Simulants
Earth Mined Lab Grown Cubic Zirconia (CZ) Moissanite
Chemical Compositions C C ZrO2 SiC
Crystalline Structure Cubic Cubic Cubic Hexagonal
Refractive Index 2.42 2.42 2.2 2.7
Dispersion 0.044 0.044 0.066 0.104
Hardness 10 10 8.25 9.25
Density 3.52 3.52 5.70 3.21
Thermal Conditions Excellent Excellent Poor High
Intrinsic Purity Only 2% are Type IIa Rare and Purest (100% Type IIa) NA NA
Unit of Measurement Carats Carats Carats Carats
Blue Fluorescence Strong to None None None None
Phosphorescence No Some NA NA
Colour Distribution Even Even NA NA