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Usually man-mad

Actually,they are man made they are made from plastics they look like they are the

real ones but thy are not.

Man-made diamonds, also known as laboratory diamonds, synthetic, or artificial diamonds, have the same chemical make up and structure as natural diamonds, i.e. those erupted to the earth's surface through volcanic pipes.

Because the conditions for making diamonds in the lab can be carefully controlled, it is possible to produce diamonds in the lab that are more pure and with fewer defects than natural diamonds.

Most man-made diamonds are used in industrial applications like diamond drill bits so they don't need high purity and clarity, hence the manufacturers don't spend the extra time and effort necessary to create gem quality diamonds.

What makes a diamond is the chemical composition and structure -- pure carbon crystal.

Fake diamonds are not made from pure carbon, rather they are usually glass, quartz, cubic zirconia, or Moissanite. They are all clear and look much like diamonds but are not as hard and may not be as brilliant.

Both glass and quartz are made from silicon dioxide (SiO2). Glass is amorphous silicon dioxide while quartz is crystaline. The quartz can be either mined or man-made.

Cubic Zirconia is the is the cubic crystalline form of zirconium dioxide (ZrO2). It is very hard - but not as hard as diamond. It takes a very trained eye or special lighting to see the difference between cubic zirconia and diamond.

Moissanite was the name given to naturally occurring crystals of silicon carbide (SiC). The naturally occurring crystals are exceedingly rare - the first ones were found in a meteor. Since their identification in the meteor, man-made, gem quality silicon carbide has also acquired the name of moissanite. Silicon carbide is extremely hard, almost as hard as real diamonds.

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11y ago

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