What does heat treatment do to gemstones?

Beyond traditional cutting and polishing, however, gems can often be treated in ways meant to alter their color or clarity. In addition to enhancing .... gems to change their color. Such fractures are sometimes purposely induced by heating the gem so that an otherwise non-porous material can more readily accept the dye. 1. read more

Heat Treatment Centuries ago, someone stumbled upon the magical effect of applying heat to gemstones. High heat, such as that from a charcoal fire, can make a bland looking gemstone change its color into something spectacular. read more

The main purpose of heat treatment is to improve or enhance the color or clarity of a gemstone and the search for attempting to alter coloration goes back centuries. Heat alone or heat in conjunction with chemical additives and radiation is often used to alter colors, improve clarity and to fill voids and fissures. read more

Heat Treatment – the exposure of a gem to high temperatures for the purpose of altering its color and/or clarity. 1. The most commonly encountered heat-treated gems include. Amber – When amber is submerged in hot oil—linseed oil for example—it's inherent body color can darken, and the material can take on a clearer appearance. read more

The oldest and most common sapphire enhancement is heat treatment, the majority of the sapphires in the marketplace have been heat-treated or thermally enhanced in furnaces. Heat treatment is used to improve a sapphire’s color, remove color zoning, and improve clarity. read more