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Red corundum, also called ruby, is an aluminum oxide with a hardness of 9 on the Mohs scale. The durability of this gem makes it an ideal choice for rings and other jewelry that will see heavy use.
Corundum is one of the most important gemstones in the world. It can be found in a variety of colors. Corundum occurs in nature in two primary crystalline forms: alpha corundum (or sapphire) and beta corundum (or ruby). The different forms have different properties: sapphires tend to be hard and transparent while rubies are softer and more translucent.
Due to its simple chemical makeup, corundum has been produced synthetically since 1837, and gem-quality synthetic corundum entered the marketplace in the early 1900s. All colors can be produced synthetically, and huge sizes (more than 100 carats!) can also be achieved using Czochralski's Drawing Method.
This process of growing corundum crystals involves taking the necessary oxide components for gem corundum (e.g., Al2O3, Fe2O3, TiO2, Cr2O3) in powdered form and melting them together in a hot content that is just barely over the crystallizing temperature. A rod with a small corundum seed crystal is lowered into the molten material and then very slowly removed. As the crystal is raised above the nutrient-rich molten mixture a small amount of corundum is formed at the interface between the seed crystal and the molten mixture. As the rod is slowly pulled upwards, new corundum continually grows below!
Synthetic stone, as expected, is considerably cheaper than natural stone.
NOT Dyed, NOT Composite
Our stones are NOT dyed gemstones and NOT composite or assembled stones (Composite gemstones are cementing two or three pieces of stones together to produce a single one.)
NOT Glass or CZs
The chromium present in the stones causes a natural red fluorescence which is stimulated by both visible and invisible (ultraviolet) light. This feature distinguishes rubies and CZs.
No Inclusions
Our ruby stones are in VVS clarity, with no visible inclusions inside. They presents in pretty pigeon blood red under the sunlight.
Well Packed For You
No more worry about scratching the gems! The stones are all packed in gem box to help securing these pieces.
Gryrigns Synthetic Ruby Stones
gr8twon
Reviewed in the United States on August 29, 2024
Had this tested. It's fake. Not synthetic corundum. Too late to return. Total rip off!
Robert Lowry
Reviewed in the United States on August 12, 2023
It's hard to get cab ruby!Great value for what you are getting!Excited!
Dale
Reviewed in the United States on June 17, 2023
People refuse to believe that lab created rubies are real rubies. I hope they never change that opinion in my lifetime, because it means that I can get a large high-quality ruby for next to nothing.A ruby of this size and quality would cost 10s of thousands of dollars if it was mined from the earth.
Rylan
Reviewed in the United States on February 10, 2023
This is exactly what I was looking for. The quality feels great. It is very smooth and clear with such a beautiful color. I'm going to use this as the main piece for a gift I am making for my mother and it will work perfectly.
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