Blue Topaz | 7 ratti | Swiss blue topaz | With Certificate7 Ratti Blue Topaz, celebrated for its stunning blue hues ranging from pale sky blue to deep London blue, is a gemstone that symbolizes calmness, clarity, and good communication. With its radiant color and remarkable brilliance, blue topaz is a favored choice for both casual and elegant jewelry. Key Features Ratti : 7 Ratti Color: Sky blue, Swiss blue, and London blue Hardness: 8 on the Mohs scale Clarity: Typically eye clean with excellent