Insofar as gems are concerned, there are several semi-precious and outright fake objects that can be 'alternatives' to a diamond. Quartz, white sapphire, zircon, moissanite, and glass.
Insofar as industrial use for diamonds -- about 80% of all diamonds mined are industrial diamonds, there are no natural substitutes. However, there are man-made, lab-created alternatives: man-made diamonds.
Diamonds are formed from carbon. Some brown diamonds may contain trace amounts of nickel -- otherwise diamonds do not contain metals.
100 percent natural diamonds are diamonds that are formed in the earth's mantle over millions of years through natural processes without any human intervention or enhancement. They are not synthetic or lab-grown diamonds.
Unformed diamonds refer to diamonds that have not been cut or shaped for use in jewelry or industrial applications. These diamonds are in their natural state as they are found in the earth, before any processing or refining has taken place.
Tanzanite is found in an area where there are no diamonds. Natural tanzanite is endemic only to the Mererani Hills of Northern Tanzania.
Diamonds are made artificially by simulating the conditions deep in the mantle where natural diamonds are formed: very high pressure and very high temperature. Any source of carbon can be used (I saw a documentary on making diamonds once where they used peanut butter to provide the carbon). Synthetic diamonds will always be less expensive than natural diamonds, therefore the jewelry business now requires natural diamonds that have been cut to have LASER etched identification codes to prove authenticity. This only became necessary after techniques were perfected to reliably get colorless synthetic diamonds.
No there isn't any healthy alternatives to steroids
No. Diamonds are formed from carbon.
Carrots are good alternatives for vitamin c.
There are no diamonds mined in any European country.
You can purchase diamonds in most any city in the world. There is no 'city' where diamonds are mined, however.
Diamonds are found in diamond mines in Africa, unless you're shopping for diamonds. If the later, you can visit any jewelery story in any city in Africa that sells diamonds and find them there.
No. Diamonds are gemstones; jewelery can be any accessory adornment.
Yes, diamonds are a form of carbon.
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Diamonds can be cut into almost any shape.
Of course because they are made of real material; they are just not diamonds. They are less valuable than diamonds.
The price or value of diamonds is not controlled by any government on earth. The price of diamonds is controlled by markets.