In conjunction with a picture of a natural diamond that was successfully auctioned off two years ago, David Fisher said that natural diamonds are extremely valuable. Fisher said that natural diamonds are extremely valuable and that even though synthetic diamonds on the market are infinitely closer to natural diamonds in appearance, the former are far more valuable in real terms. "As a gemologist, it is my greatest responsibility to help consumers distinguish between natural and cultured diamonds and to maintain consumer confidence in the industry in a scientific manner." David. Fisher believes that building consumer trust and confidence is a very important job for gemologists.