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How can you tell if a diamond is a real diamond? Would they insert a fake in real gold?

I have a necklace, not sure where I got it but it is 14K gold along with the chain it’s on. It also has a diamond in it but I can’t tell if the diamond is real. I know they have lots of diamonds that are cubic zirconium’s or diamond-aura’s but how can I tell the real thing with the naked eye?


  1. Yes, they can set a lab created diamond in real gold. Some fake diamonds appear to be real but aren’t.
    To find out if it’s real, take it to a reliable jewelry store and have it appraised.

  2. Look through it. Diamonds have a high “refractive index” (meaning they sharply bend the light that passes through them). Glass and quartz have a lower refractive index, meaning they sparkle less because they bend light less, even when they’ve been cut nicely (because the refractive index is an inherent physical property which is not altered in any way by a nice cut – unless, technically speaking, the cut induced a permanent strain on the crystalline lattice).
    If the diamond is not mounted, turn it upside down and place it on a piece of newspaper. If you can read the print through the stone or even see distorted black smudges, then it probably isn’t a diamond. (Unless the cut is disproportionate, in that case print can be seen through a real diamond.)
    If the stone shows any sign of double refraction, it may be Moissanite (silicon carbide), a gemstone that is so similar to a diamond that even jewelers can have a hard time telling them apart. **look at the facet junctions from the top side of the stone, the ‘star’ facets’ if you see what looks like double vision then that is the doubling effect.
    If the diamond is mounted, you should not be able to see the bottom of a diamond looking directly from the top.
    Draw a small dot with a pen on a piece of white paper. Place your unmounted diamond over the center of the dot. Look directly down on it and if your stone is not a diamond, you will see a circular reflection in the stone.
    Ask for a certificate. Make sure it’s from an impartial diamond grading authority (e.g. GIA, AGSL, EGL, PGGL) or an independent appraiser who is affiliated with a professional organization (like the American Society of Appraisers)
    Observe the reflections. A real diamond’s reflections usually manifest in various shades of gray. If you see rainbow reflections, you’re either dealing with a low-quality diamond or a fake


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