Lovely rope edging frames a pear cut blue and white sapphire in this 14K yellow gold pendant. The bezel set blue sapphire weighs 0.69 ct, measures, has VVS dealer rated clarity and displays a beautiful well saturated cornflower blue color. The Ceylon sapphire's bright blue brilliance is joined by a 4 X 3 mm pear cut Ceylon white sapphire that weighs 0.17 ct. The white sapphire has excellent near loupe clean clarity, strong white color void of any secondary unattractive hues and a precision cut that results in beautiful white brilliance. The pendant measures 32 mm or 11/4" in length and weighs approximately 2.0 grams. This magnificent piece is offered by Jill Underhill of Color Symphony (http://www.colorsymphony.com) and will be shipped directly from their location in New Hampshire.
This gemstone (or gemstone that is part of this piece of gemstone jewelry) has been enhanced by traditional heat treatment. Traditional heat treatment is used to improve a stones color, remove color zoning/banding, and improve clarity. This treatment is considered permanent. The only way to tell if a colored stone has been treated is for the stone to be analyzed by a lab. Generally only gemstone laboratories have the equipment necessary to make a qualified judgement with any certainty.
Untreated gemstones are rare and should be verified by a lab independent of the seller. A good rule of thumb is to always assume a gemstone has been enhanced, unless valid certification from a reputable laboratory is available. No one that sells jewelry or gems should be doing appraisals, certifications, or analysis. It should always be an independent third party with no vested interest in the sale.