The first step in examining any diamond is to observe the whole diamond. Well-informed consumers start with visual observation. This gives the buyer the chance to examine and classify all aspects of the physical appearance of the diamond.
Natural colored diamonds are available in all mainstream colors, but certain colors are rare. Top quality pinks, reds, blues and other shades are extremely rare and expensive. Many colored diamonds are sold by dealers and jewelers to consumers who crave for rarity, beauty and status. Consumers with disposable income buy them because they like it. A few may be aware of treatments, but they tend to forget it. Many consumers don’t know about it.
Today diamonds can be coated with yellow, orange, pink, purplish pink, blue and green to look like the natural ones. Well-trained buyers look for iridescent film-like coating with proper magnification and lighting. But again this may not be always easy and practical. The treatment is not permanent. If in doubt always consult a reputed gem testing laboratory.
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