Gemstone: Natural Blue Sapphire Weight(Carats): 6.18 Weight(Ratti): 6.86 Refractive Index: 1.76 Specific Gravity: 3.99 Dimensions: 13.22 × 8.97 × 5.40 mm Cut: Cushion Origin: Sri Lanka (Ceylon) Color: Royal Blue Clarity: Transparent Treatment: Natural (unheated/heat-treated if applicable) Use: Fine Jewelry, Astrology, Vastu
