FTC Guidelines

Scientists from all over the world and all diamond grading laboratories have subjected lab-grown diamonds to rigorous testing and undertaken many studies to ascertain that diamonds from above earth are identical to those from under the earth.

According to Federal Trade Commission (FTC) Guides for the Jewelry, Precious Metals, and Pewter Industries: "A diamond is a mineral consisting essentially of pure carbon crystallized in the isometric system." FTC revised its definition of diamond that previously read "natural mineral". The Commision no longer defines a “diamond” by using the term “natural” because it is no longer accurate to define diamonds as “natural” when it is now possible to create products that have essentially the same optical, physical, and chemical properties as mined diamonds, noted the Guides.(Source)

More recently, even Federal Trade Commission (FTC) revised its Jewelry Guides and omitted the term 'synthetic' as prescribed qualifiers for lab grown diamonds. The Commission also no longer defines a “diamond” by using the term “natural” because, "it is no longer accurate to define diamonds as “natural” when it is now possible to create products that have essentially the same optical, physical, and chemical properties as mined diamonds," noted the FTC.