Brazil is the world's largest producer of precious stones, and its colored gems production accounts for about 65% of the world's output. The gemstones produced are large in quantity and high in quality, such as amethyst, topaz, aquamarine and emerald. The country also produces a mysterious Pale tourmaline with electro-light, which is extremely beautiful in color. The price per carat can reach tens of thousands of dollars, which is still far from meeting the market demand.

The gems produced in Sri Lanka are: sapphire, ruby, emerald, moonstone, aquamarine, garnet and so on. Almost all high-quality and medium-quality colored gems products are made in Sri Lanka, so they are also called "Gem Island".

Almost all kinds of colored gems are found in Madagascar, and at least 30 kinds can be seen in the market: emerald, ruby, sapphire, chrysoberyl, aquamarine, caesium emerald, chrysoberyl, tourmaline, seasonal gem, garnet gem, feldspar gem, apatite, cordierite, flint, topaz, zircon, opal and so on.

Colombia is synonymous with top jadeite. Emeralds produced there are rich in color, and tens of millions of dollars of emeralds are produced to markets all over the world every year, accounting for half of the global emeralds market.

Deep in the foothills of Kilimanjaro in the northeast of Tanzania, East Africa, Tanzanite is the only producing area in the world, adjacent to the Kenyan border.

The Urals mining area in Russia is the most famous metamorphic rock producing area in the world.

Afghanistan is rich in gem resources, mainly concentrated in the middle Precambrian Pamirs. According to the genetic analysis of gems, they can be divided into metamorphic sedimentary type and igneous metamorphic type. Metamorphic sedimentary deposits mainly include ruby, kyanite, garnet and cordierite. The types of igneous metamorphism mainly include ruby, sapphire, emerald and lapis lazuli. In addition, there are some gem deposits related to Mesozoic and Cenozoic pegmatites, such as kunzite and lapis lazuli.

In addition, there are some areas that produce precious stones, mainly including:

1, USA: The USA is similar to Brazil, mainly producing tourmaline, garnet, olivine, crystal, topaz and turquoise.

2. Canada: mainly produces amethyst, tourmaline and nephrite;

3. India: mainly produces ruby, sapphire, emerald, Dongling stone and garnet; 4. Mexico: mainly produces agate, opal and topaz (topaz); 5. Bolivia: mainly produces crystal gems such as amethyst.