It's because in that particular country it hasn't been found or yet digged. But certainly in the future, that country might find it but we won't know because we might be dead.
They might not have been found in that country yet.
Colombia
Garnet, the birthstone of January, is mined in a rainbow of colors. From the fiery orange of Mandarin Garnet to the rich green of Tsavorite Garnet and to the most widely recognized color of Pyrope Garnet, it is considered a great gift to symbolize friendship and trust.
Barium is mined in Nevada
Plastic is not mined. It is a man made material.
how is found and mined
They might not have been found in that country yet.
Zambia
Diamonds mined in Australia follow the same type of distribution channel as diamonds mined in any country. Mined diamonds are graded, brokered, then bought and sold based on the diamond's quality.
The main crops grown in this country include wheat, corn, and soybeans. Mining is also a significant industry, with resources such as coal, iron ore, and copper being mined.
Opals are quite rough when they are first mined. They are cut and polished and sometimes oiled to look nice. Doublet opals are often covered with another material such as glass which can add shine.
There are no diamonds mined in any European country.
You can dig for gemstones in certain mines around the country and around the world. The type of gemstone you can find depends on where you are located.
According to Geology.com, the latest figures available (@ 2014August) show that Botswana leads as the country with the highest production in the number of carats mined with 22,900 million carats mined in 2011 and an estimated 24,000 million to be mined in 2012. It is key to remember that only about 20% of all diamonds mined are gem quality, the remainder being industrial diamonds.
some people feel it should be mined because;their Country has not have enough of this mineral or product/resource.
Pay now, play later. Serve your country now, you'll be glad you did...later.
Anything mined