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What is a Lab Created Gemstone?

Lab created and Lab grown and synthetic are synonymous terms. To use any of these terms, according to the FTC, the gemstone must be identical to the natural in every way. Composition, Hardness, and Optically.
Below is an excerpt from the FTC guidelines for gemstone sales for your reference

“It is unfair or deceptive to use the word “laboratory-grown,” “laboratory-created,” “[manufacturer name]-created,” or “synthetic” with the name of any natural stone to describe any industry product unless such industry product has essentially the same optical, physical, and chemical properties as the stone named.
“No Lab Gemstone is RARE, as the rough can be made anytime.

Below is a list of Lab Gemstones and correct composition

Lab Emerald – Beryl(pricey)
Lab Aquamarine – Beryl(Pricey)
Lab Alexandrite – Color Change Chysoberyl(pricey)
Lab Ruby – Corundum
Lab Sapphire – Corundum
Lab Spinel – Spinel
Lab Diamond – Diamond(approximately half the cost of a natural diamond)
Lab Amethyst – Quartz
Lab Citrine – Quartz
Lab Ametrine – Quartz
Lab Garnet – Garnet

Common Simulated Gemstones – simulated gemstones do not have the same properties as a natural gemstones but resemble the natural stone in appearance

Tanzanite – Glass(polysilicate) ,Cubic Zirconia – Forsterite(expensive)
Aquamarine – Glass – Lab Spinel
Alexandrite – Lab Corundum /  Color change glass
Amethyst – Purple Glass – Cubic  Zirconia
Citrine – Yellow Glass – Cubic Zirconia
Diamond – Cubic Zirconia – YAG – Mossianite
Emerald – Glass – spinel – diffused topaz – Lab corundum
Garnet – Glass – Cubic Zirconia – Lab Corundum
Mexican Opal – Glass – Cubic Zirconia – lab Corundum
Peridot – Glass – Cubic Zirconia
Blue/Swiss Topaz – Glass – Lab Quartz – Lab Spinel
Tourmaline – Glass – Lab Corundum – Lab Spinel
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