The Verneuil method (or Verneuil process or Verneuil technique), also called flame fusion, was the first commercially successful method of manufacturing synthetic gemstones, developed in the late 1883 [1] by the French chemist Auguste Verneuil. It is primarily used to produce the ruby, sapphire and padparadscha varieties of corundum, as well as the diamond simulants rutile and strontium titanate. The principle of the process involves melting a finely powdered substance using an oxyhydrogen flame, and crystallising the melted droplets into a boule. The process is considered to be the founding step of modern industrial crystal growth technology, and remains in wide use to this day.
Corundum has two primary gem varieties: ruby and sapphire. ... Because of corundum's hardness (pure corundum is defined to have 9.0 on the Mohs scale), it can scratch almost every other mineral. It is commonly used as an abrasive on everything from sandpaper to large tools used in machining metals, plastics, and wood.
FLAME FUSION CORUNDUM BLUE SAPPHIRE NO.34
CHEMICAL COMPOSITION: Al2O3
SPECIFIC GRAVITY: 3.99–4.02
REFRACTIVE INDEX: 1.761–1.769
HARDNESS: 9
DISPERSION: 0.015–0.018
FIRE/HEAT RESISTANCE: 2044 °C
PROCESS: Verneuil/Flame Fusion/HydrothermalLAB CREATED ROUGH BLUE SAPPHIRE SYNTHETIC CORUNDUM
SHIP FROM THAILAND
MADE IN SWITZERLAND
QUANTITY 1 PIECES