406cts Purple Sapphire Swiss Boule Verneuil Synthesis of Corundum Synthetic Gem

Description

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Gemstone: Purple Sapphire Boule Corundum
Color: Purple
Size: 49X24X17.7mm 45x19x18mm Approx.
Carat: 406 Approx.
Clarity: Transparent
Shape: Rough
Cut: Excellent
Treatment: Verneuil Process
Synthetic: Yes
Hardness: 9
Origin: Switzerland
Refractive Index: 1.76 – 1.77
Specific Gravity: 3.95-4.03
Purpose: Jewelry Making, Lapidary Arts, Crafts, Gift, or too Collect.
Birthstone: Does Not Apply
Comments: Sapphire Boule Synthetic Corundum From Switzerland Authentic
About:
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 late 1883 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 crystallizing 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.
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