Today Becoming an educated consumer is not such an easy matter when dealing with all the variables related to the purchase of a gemstone. As a rule, a clear transparent gemstones with no visible flaws is the most valued.
Phenomenal gemstones owe their stars and eyes to inclusions.
Tiny inclusions reflecting back light put the eye in the cat's eye and the star in the star sapphire. Inclusions can also be a birthmark, telling us where a particular gemstone was mined. A common misperception in judging gems is people assume that the darker the color, the better the stone. If a gem's color is too dark, it is subdued and lifeless. A much better rule of thumb is the brighter and more rich and vivid the color, the better.