Black Opal Stone Original Certified This Stone is a very attractive Gemstone. Fire Opal is very popular and desirable due to its beauty and play of color (Fire) effect. The entering light diffracts into different colors resulting in the appearance of rainbow colors on its surface. This appearance of Rainbow colors is referred to as ‘Play of Color’ effect, also called ‘Fire’ in Opal. This phenomenon is common to Diamonds also. Opal is Birthstone of October month.
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