The emerald shaped Blue Topaz is perfectly accented by a halo of pavé diamonds and pavé split shank design in 18K yellow gold. Since the 2000's, Blue Topaz has become the 2nd most popular gemstone in the world! Naturally occurring Blue Topaz is quite rare, you'll find the vast majority is heat treated as is the case with this ring. The treatment is permanent and stable within the gem and done in a fashion to comply with all industry standards.