Heat Treated Blue Sapphire

Sapphires that are heat treated are still considered natural 100 natural.

Heat treated blue sapphire.

Prices for ovals and cushions. Pockmarked facets and abnormal girdles figure 4 may also be seen if the stone has figure 3. Our natural untreated sapphires offer true beauty rarity and superior value compared to treated sapphires. We offer a vast selection of blue sapphires pink sapphires yellow sapphires white sapphires and other unique natural sapphires.

Pick your natural rough stones. Add 8 to 10 for rounds and pears. There is no guaranteed way to predict color changes but according to the gem mountain sapphire mine in philipsburg montana 15 to 20 percent of heat treated sapphires turn yellow or orange. Learn how heat treatments beryllium diffusion flux healing fracture filling and irradiation change the look of sapphires on the market today and into 2020.

Most people prefer the darker color saturation and improved clarity and brilliance of a heat treated stone over the pale pastel color of the average rough sapphire. Unless stated and certified to be unheated or no heat the sapphires you see on a ring or a pair of earrings are likely to be heat treated. Heat treatment from lower to higher temperatures can have a significant impact on the color of metamorphic blue sapphires from madagascar. Sapphire treatment guide heated.

Average brilliancy of 40 to 60. If certified burmese and untreated add 50 except fair or lower grades. Our sapphires are not synthetic heated to extreme temperatures diffused irradiated glass filled or oiled. There are different types and level of heat treatment in sapphires that can be classified from very slight to quite extreme.

Heating is an accepted treatment for sapphire. Almost all sapphires 95 of them today are heat treated. But for fine quality sapphire confirmation from an independent laboratory like gia that there is no evidence of heat adds to a sapphire s rarity and value. Add 10 to 20 for emeralds and marquis.

Heat treating sapphires is a standard industry practice that improves the clarity and enhances the color of sapphires from gem mountain. Discover what it means for a sapphire to be treated how to identify them how these processes affect the rarity and integrity of a stone. Sellers heat or cook sapphires in their rough state before handing them to a gemcutter for faceting. In our study temperatures between 800 and 1100 c in air lightened the blue color while higher temperatures which can dissolve rutile created deeper more saturated blues.

Heat treatment in sapphires is legal and acceptable. Distinguishing these levels of treatment can also affect the price of a sapphire dramatically.