Platinum, Sapphire and Diamond ring PROPERTY OF A PHILADELPHIA ESTATE Platinum, Sapphire and Diamond Ring Estimate: 350,000 – 450,000 USD Centered by a cushion-shaped sapphire weighing 13.22 carats, flanked by two triangular diamonds weighing approximately 1.80 carats, size 2¼. This sapphire has the pedigree! Kashmir origin with no heat treatment (both Gubelin and AGL reports). […]Continue reading »
Sapphire Consumer Information
As provided and validated by various gemmological organizations, laboratories and the "World Jewelry Confederation CIBJO"
present which determine the colour. Sapphires come in every colour except red. The red corundum is a ruby. The most prized blue colour is also known by a flower and is called “cornflower”. The rarest sapphires, “padparadschas” (named after the lotus flower), are orange-pink or pinkish-orange in colour. “Fancy” sapphires” are any “not blue” sapphires.
which may intersect at 60-degree angles. In such cases, when the gem is cut as a cabochon, a star effect may occur. Inclusions can cause some gems to have milky colouration, this becomes a detriment if it also causes a perceived loss of blue. In top Kashmir sapphires the haziness from inclusions (called sleepiness) acts to diffuse light and colour resulting in even blue coloration.
cut outlines. They are sometimes engraved or carved today, though sapphires were sometimes engraved during India’s Mughal Era.
otherwise. Color: Irradiation can create orange or yellow sapphires out of colorless stones. Color does not stay. Color: Additional chemical elements can be “diffused” in the stone to enhance/change colors. Clarity: fissures can be filled with glass. This occurs more frequently in rubies than sapphires.
toughness. As with most gemstones, a soft moistened cloth, or a soft bristle toothbrush may be used to clean the gem.