To start creating these synthetic stones, studying natural stones was important:
-Their condition of formation
-Their chemical composition
And then develop technical means that will be used to manufacture them, knowing that these technologies are constantly evolving.
The needs of the industry have played an important role in the development of synthetic stones.
It should be known that since the beginning of the years 1880 chemists work on the synthesis of gems, it will be necessary to wait 1885 for the first synthetic rubies to enter the market of the jewellery (the rubies of Geneva).
Example of manufacturing methods:
-Growth by flame Fusion, process Verneuil (production corundum (Ruby, colorless sapphire and all colors as well as starry) spinel, Rutile, Scheelite in other. (represented in the image corundum synthetic process Verneuil)
-Growth by vertical draught, Czochralski process (production of corundum (Ruby, colorless sapphire and all colours), spinel, chrysoberyl including Alexandrite, fluorite, Forsterite, Fresnoïte, etc.
-Growth by anhydrous dissolution (melt/flux) production of: Beryl including Emerald, corundum including Ruby and Sapphire, spinel, Phénacite, Sphene, Perovskite…
-Growth by hydrothermal solution production of monocrystalline quartz including rock crystal, smoked quartz, amethyst, Citrine, Ametrine and Prasiolite, beryl including emerald and red Beryl (Bixbite), corundum including rubies, calcite, zinc, fluorite, Apatite, Chrysoberyl