Diamonds are brought to the surface from the lower mantle by means of kimberlite pipes.
Kimberlite pipes are only found within old cratonic crust, such as Africa.
AFRICA
Kwashiorkor is most commonly found in Africa.
The gemstones that are mostly found in bracelets are ruby's and diamonds. The gemstones will be found in foreign country's such as Brazil or Columbia.
Generally pink diamonds are found in Australia. Australia's Argyle mine, in far north Western Australia, produces around 90% of the world's supply of pink diamonds. These are the world's only "intense" pink diamonds. Pink diamonds, one of the most rare and expensive diamonds in the world, are also mined in India, Brazil and Africa, but these are lighter in colour.
The mineral diamond is found on earth where volcanic pipes have blasted it to the surface from where it is formed, deep within the earth's mantel. Diamonds have been found in India, Africa -- several countries -- Brazil, Canada, Australia and even in the United States. Geologists find 'trace minerals', including kimberlite, that may indicate -- about one in 200 times -- that diamonds are included in the volcanic situation. When water flows over the top of a diamond-producing volcanic pipe and tumbles diamond stones along, diamonds can be found in riverbeds, or at the mouths of rivers as they empty into salt water. When a productive volcanic pipe is located, the land owner may choose to mine the area for diamonds.
in Africa
Diamonds are found everywhere on earth except in Europe and on the Antarctic continent.
Most diamonds are found on the earth and in the earth near indicator minerals, such as kimberlite.
Kimberley, South Africa may be the most notable locale for diamonds in South Africa. You can read more, below.
A natural chocolate diamond can be found in Africa, Russia and Australia: they are found most commonly in Australian diamond mines.The Australian diamond mine that yields the most chocolate diamonds is Argyle Diamond Mine in the remote region of Australia's north west.
AFRICA
Diamonds are found in Australia, many countries in Africa, Arkansas, a US state, Brazil, Canada, India and Russia.
Canary yellow diamonds can be found ion many regions the most valuable come from South Africa.
Kimberlite is a rare, blue-tinged, coarse-grained intrusive igneous rock that often contains diamonds. Some kimberlite deposits have been found in Western Kenya.
"Best" is a judgement, and you are the judge. The 'why' part of your question can only be answered by Mother Nature, She being the most prolific producer of excellence in the natural world. In diamond type, the most rare diamonds are of a Type II -- a and b. These diamonds are the 'purest of the pure' diamonds. Africa is not the only producer of these diamonds -- the Cullinan was found in Africa; but diamonds of this type are also found in India, i.e., the Koh-i-noor. You can read more, below.
The most commonly known are diamonds, but there are other precious and semi-precious gemstone mines in Southern Africa.
in Africa