認められた4つの貴重な宝石のうち, つまりダイヤモンド, ルビー, サファイア, そしてエメラルド, 合成ダイヤモンドの高価さを除けば, 公式に大量に販売されていないもの, 他の 3 つの宝石は大量に製造できないだけではありません, でも制作費もかかるし. It is much lower than natural products and has been officially sold on the market. One of the earliest successful production is ruby.
早くも 1877, French chemist Frémy produced artificial rubies, but the particles were small and the cost was high. で 1902, the French scientist Werner Leaf produced artificial rubies by flame melting. 数年後, で 1910, artificial sapphires were produced in the same way.
As the technology was not mature and popular at that time, artificial rubies and artificial sapphires were not common in the market. It was not until after the Second World War, つまり, in the late 1940s, that artificial rubies and artificial sapphires were commonly sold in the market. Not only were the prices quite expensive, but the sellers often did not say that they were artificial, つまり, they were often mixed with natural Sold in the product. It can be seen that the rubies of that period are not necessarily natural, because artifacts have been sold as early as that time.
After the 1950s, due to the popularization of production technology, the prices of artificial rubies and artificial sapphires plummeted. By the end of the 20th century, the price of artificial rubies had fallen to a few tenths or even one percent of natural rubies. The price of artificial sapphire is also much lower than that of natural sapphire. 中国本土では, from the 1950s to the end of the 20th century, some people in the gem industry called artificial ruby ”Rubin stone”, which is actually the transliteration of the English word “ルビー”.
Since the prices of artificial rubies and artificial sapphires are much lower than natural products, how to identify them has become an important task. 残念ながら, it is impossible for ordinary consumers to identify them by themselves. If you want to accurately identify them, you can only ask a gem expert or find an appraisal agency.