How can you tell if a diamond tennis necklace is real?

The most important factor in determining whether a diamond tennis necklace is real or fake is the quality of the diamonds. Real diamonds are extremely rare and valuable, so if the necklace contains low-quality or fake diamonds, it is likely not a real diamond tennis necklace. Another way to tell if a diamond tennis necklace is real is by its weight. Real diamond necklaces are often very heavy, so if the necklace feels light, it may be fake. Finally, real diamond necklaces will have a high price tag. If the necklace is being sold for a very low price, it is likely not made with real diamonds.