This gem is 100% Natural with Natural color."Not Treated in any way. Beautiful Center-stone for an engagement Ring. Color enhances to incandescent light. Gem with High Luster and Good Clarity. A Gem of Lasting Beauty. Among the Rarest of gemstones. Will make a Gorgeous Ring or Pendent accented with Diamonds. UNHEATED SAPPHIRES - Almost all Sapphires mined Raw or Geuda form are Heat Treated to high temperatures to induce color and to enhance clarity and luster. This process is now the Industry Standard for Sapphires. This Sapphire is UNHEATED. Certified ""No Thermal Treatment"" (Please see Certificate).
The Sapphire belongs to the corundum group, with excellent hardness, exceeded only by Diamond –the hardest mineral on Earth. The oldest sapphire finds are in Ceylon, or Sri Lanka as it is known today where they are mined from ancient times. Ceylon sapphires are recognized by the luminosity of their light to mid-blue colors. Ranging from blue to purple and pink. Top-quality sapphires are extremely rare. Beauty, magnificent color, transparency, and durability are the main features. Color determines the value of a sapphire. Sri Lanka is known for the finest and the largest sapphires in the world.