Corundum Blue Sapphire Stones VS Lab Grown Blue Sapphire Stones Color Comparsion from FU RONG GEMS

Corundum Blue Sapphire Stones VS Lab Grown Blue Sapphire Stones from professitional Suppiers and manufacturer -FU RONG GEMS
https://www.frgems.com
The stones in the video are Corundum Blue Sapphire Stones and Lab Grown Blue Sapphire Stones square princess cut 6.5x6.5mm stones, can you tell their difference?
What is Pulled Czochralski Blue Sapphire Gemstone?
https://www.frgems.com/pulled-czochra...
A:Czochralski process, uses radio waves to melt the aluminum oxide. A rod tipped with a seed crystal is inserted into the mixture and slowly rotated and pulled out, creating a column of blue sapphire stones.
What's Corundum Blue Sapphire Gemstone?
Synthetic Corundum comes in all colours of the rainbow but is most commonly found as opaque crystals with dull colours. Red corundum is called ruby, blue corundum is called sapphire, and all other colours are called fancy sapphires. Some varieties of corundum will fluoresce under short wave and long wave UV light if there is enough chromium in the crystal structure but little iron, which tends to quench any emitted energy.
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