How To Find a Natural Diamond? Many diamond substitutes have entered the market in recent years, and in some cases, they may be referred to as "fake," "synthetic," or "simulated." The Gemological Institute of America, or GIA, refers to lab-created diamonds as "man-made or synthetic diamonds."
Simulated diamonds, on the other hand, are stones that only appear to be diamonds, such as cubic zirconia, white sapphire, moissanite, zircon, rutile, spinel, and synthetic garnet.