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In the second half of the 1990s, synthetic and optimized gemstones as well as new (not early) synthetic gemstones continued to be produced in Russia. Especially in the industry, red, sapphire, emerald, amethyst, citrine; brown, blue, green and pink crystal, rhomboid, spinel, yttrium aluminum garnet, yttrium gallium garnet, zirconium The production of Kong Shishi, Gui Opal and Turquoise continues to expand.
Topaz's color change: from colorless, brown to blue, green; yellow beryl: from yellow green to blue; agate: gray, white → red, yellow, green, blue, etc.; turquoise: white → sky blue; Gold stone: green → dark blue; nephrite: dark green → pale green and white; crystal: colorless → smoke and green yellow.
In the near future, Russia produced large-grain (1~4 carats) gemstones: yellow and blue; colorless synthetic diamonds; blue and red beryl; colorless and colored synthetic carbon silica; pink and two-color purple one Citrine, two-color purple-green crystal and citrine and Dongling jade; bright yellow-orange langasite. In the 1960s, after a short interruption, the flux and hydrothermal synthesis of red and sapphire were re-developed. Many new technologies have been developed, such as: the colorless and pale sapphire surface is changed to blue; the topaz is changed to blue; the bright green crystal is changed to blue and pink; the synthetic cubic zirconia is changed to black or bright white; White, bright, and so on.
At the same time, after a planned change in the last five years, a structure and group of synthetically optimized gemstone production was established. Although the synthesis and optimization of certain crystals (such as colorless crystals, red, sapphire, marble, garnet, etc.) are still operated independently by the state, in fact, the production of all other types of synthetically optimized gemstones has been Private companies and joint ventures are operating. In short, in the second half of the 1990s, many similar companies were established. The competition between them led to reproduction, sudden price falls, and the result was the destruction of many such companies. Typical examples are synthetic amethysts, expensive opal, emeralds and marbles, as well as optimized natural topaz.
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