Carbon dating earth
These conditions are met in two places on Earth; in the lithospheric mantle below relatively stable continental plates, and at the site of a meteorite strike.
The conditions for diamond formation to happen in the lithospheric mantle occur at considerable depth corresponding to the requirements of temperature and pressure.
An alternative, and completely different growth technique is chemical vapor deposition (CVD).
Several non-diamond materials, which include cubic zirconia and silicon carbide and are often called diamond simulants, resemble diamond in appearance and many properties.
Diamond is renowned as a material with superlative physical qualities, most of which originate from the strong covalent bonding between its atoms.
In particular, diamond has the highest hardness and thermal conductivity of any bulk material.
Special gemological techniques have been developed to distinguish natural diamonds, synthetic diamonds, and diamond simulants.
Not all pipes contain diamonds, and even fewer contain enough diamonds to make mining economically viable.The most familiar uses of diamonds today are as gemstones used for adornment, a use which dates back into antiquity, and as industrial abrasives for cutting hard materials.