In 1819, Dr. E.D. Clarke used a newly invented blowpipe to melt two rubies on charcoal, accidentally producing a new material-ruby glass.
In 1837, French chemist Marc Gaudin began systematically studying gemstones from a chemical perspective. He reacted a saturated solution of potassium dichromate and potassium sulfate, and then melted the residue to obtain aluminum oxide crystals, thus initiating the formal history of chemically synthesizing gemstones.
In 1877, Ferey and others synthesized the first synthetic rubies suitable for cutting and polishing using different methods, producing rhombohedral ruby crystals weighing approximately 1/3 carat.
In 1882, large quantities of fused rubies (Geneva rubies) appeared on the European market.
Around 1900, Verneuil synthesized many beautiful and high-quality synthetic rubies using his invented melt crystal growth method. This method made large-scale commercial production of synthetic gemstones possible.
In 1918, Chochralski developed the Bridgman method (pulling method) for melt crystal growth, leading to more large, high-quality synthetic gemstones on the market.
In 1940, the Chatham Company successfully synthesized emeralds using the flux method.
By 1941, the company had synthesized emerald crystals weighing up to 15 carats, though of lower quality.
Around 1950, the Italian scientist Spezia invented the hydrothermal method for synthesizing quartz, leading to commercial production of synthetic crystals.
In 1957, Bell Laboratories in the US announced successful synthesis of rubies using the hydrothermal method.
In 1955, General Electric in the US announced successful synthesis of industrial diamonds.
15 years later, in 1970, gem-quality diamonds were synthesized. High-pressure combined with chemical vapor deposition (CVD) technology can now synthesize jewelry-quality diamonds weighing over 11 carats.
In 1972, Pierre Gilson from France first successfully developed the technology for synthesizing opal.
In 1974, synthetic white opal was marketed. In 1976, Soviet scientist Dukoka improved the hydrothermal synthesis method for producing rubies, enabling the commercial production of synthetic rubies that closely resemble natural rubies. In the 21st century, gemstone synthesis technology continues to advance, making it possible to synthesize virtually any type of gemstone.
