4.06 ct Red Oval Ruby
This gemstone is valuable in two counts: one for the cut and one for the colour. Would look gorgeous in rings or pendants.
Rubies are increasingly being treated by filling with glass and stones. Rubies that have been treated in this way may contain a very large percentage of glass. If you become aware that you or a customer has such a ruby, avoid direct heat, acids, ultrasonic and steam cleaners, knocks and blows.