#12083 Sapphire Color Change 4.06 cts
Highly Lustrous Gem
  Quantity : 1
  Carats : 4.06
  Size : mm 9.6x7.7
  Color : Brown - Red
  Clarity : Very Very Slight Inclusions, Highly Lustrous
See Clarity Scale
  Shape : Oval
  Treatment : UNHEATED
  Origin Sri Lanka
  Location :
Colombo, Sri Lanka

SELLING PRICE US $ 790.00

 

Stunning Center-stone for an engagement Ring!

Large Sizes are Rare!

Color enhances to incandecent light

UNHEATED SAPPHIRES - Almost all Sapphires mined Raw or Geuda form are Heat Treated to high temperatures to induce color and also to enhance clarity and lustre in a matter of hours. This process is now known as the Industry Standard for Sapphires.

However the Sapphires Naturally matured in the earths crust, having gone though
the natural heating process through thousands of years, are very few and most
sought-after by collectors and connoisseurs alike, and command high prices.

This Sapphire is UNHEATED. Certified "No Thermal Treatment" (Please see
Certificate). This gem is 100% Natural with Natural color.

Natural gem Free of any Treatment - 100% Natural

More Images
R.I. : 1.759-1.778 Hardness : 9
Chemical Comp. : AL 2 2O 3
Density : 4.00
Crystal Group : Hexagonal

Color–Change Sapphires are Sapphires that change color due to exposure to different light conditions.

Some display faint changes while others display strong changes, to incandescent or fluorescent lights. One type changes from green to red and the other Blue to Reddish Purple, and the value of the gem depends upon the strength of change.

Sri Lanka is well known for the finest quality sapphires and come in a range of colors. Mining continues from ancient times to this day. Sri Lanka is known for producing the finest and largest sapphires in the world.

op-quality sapphires are extremely rare. Beauty, magnificent colour, transparency, and durability are the main features. Color determines the value of a sapphire. The most valuable colors for blue sapphires are violetish blue. Highly saturated medium or dark medium tones are best. Sri Lanka : is well known for the finest quality sapphires, and the largest sapphires in the world. < See list of World Famous Gems >