Blue Sapphire 5.781 ct
This sapphire is blue in color. The gemstone weighs 5.7 carats. The stone is 1.2 cm long, 9.8 millimeters wide, and 5.2 millimeters deep.
A certificate for this stone was issued by Lotus Gemology. Lotus Gemology is based in Bangkok, the hub for colored gemstone trading. The laboratory is led by Richard Hughes, one of the most recognized specialists in corundum and author of the classic Ruby & Sapphire. Lotus Gemology has graded this stone as "Indigo Blue." The gemstone institute has its own color classifications for rubies and sapphires, with "Indigo Blue" being one of these color types according to Lotus Gemology.
This transparent sapphire shows medium inclusions and good color quality.
The 5-carat gemstone was cut into a faceted oval, with a brilliant-cut top and four facet crowns below. The stone shows signs of thermal treatment.
The Lotus Gemology certificate indicates that the gemstone originates from Thailand (Siam).
