it depends in what shape the diamond is cut
Another Answer
As a raw stone, a diamond can be shaped like a pyramid, or two pyramids joined at the base. Can you count the corners in the two-pyramid example?
You're asking about a raw diamond, one that has not been cut or polished. In context, sometimes a raw diamond's "... eight corners are truncated by the eight faces of the octahedron." This is one description of a diamond's raw, crystalline form. You can read more about the geometric descriptions of raw diamonds, below.
From Diamond Source: "A cushion cut is a square or squarish-rectangular cut with rounded corners and 58 brilliant-style facets that resemble a pillow shape..." You can read more about this cut, below.
The number of facets in a cut and polished diamond depends on the style of the cut, not of the carat weight of the stone. Except that the diamond cutter who planned and executed the cut, designed the cut to maximize the raw stone's clarity and colour, while preserving the carat weight.
Depending on how the pavilion is designed, the princess cut diamond can have more facets than the standard round brilliant. Some have just 50 facets, while others range to 144 facets. The amount of sparkle can hide flaws in clarity and cut, to some degree. However, no cut will hide color -- in fact, you can find the true colour in the corners of a princess cut.
Your answer depends on the cut of the diamond in question.
Diamond. Diamond is, for example, polished with diamond powder.
Yes.
They are ground on "Diamond wheels" and laped with "Diamond dust" then polished.
About 20% of all diamonds mined can be cut and polished into gemstones -- and in that case, you could call one a 'polished rock'. 'Polished rock' is not considered a natural state for a raw diamond, however.
The diamond cutter taught the intern how a diamond cuts diamond as they cut and polished the raw stone.
You're asking about a raw diamond, one that has not been cut or polished. In context, sometimes a raw diamond's "... eight corners are truncated by the eight faces of the octahedron." This is one description of a diamond's raw, crystalline form. You can read more about the geometric descriptions of raw diamonds, below.
From Diamond Source: "A cushion cut is a square or squarish-rectangular cut with rounded corners and 58 brilliant-style facets that resemble a pillow shape..." You can read more about this cut, below.
As diamond is the hardest natural mineral on earth, theoretically, only diamond can cut a diamond. But, diamonds are also cut by lasers. Diamonds are cut and polished on diamond wheels. They are held against a rotating plate which is made from hardened steel infused with diamond dust.
The number of facets in a cut and polished diamond depends on the style of the cut, not of the carat weight of the stone. Except that the diamond cutter who planned and executed the cut, designed the cut to maximize the raw stone's clarity and colour, while preserving the carat weight.
In an unpolished or a rough gemstone the reflection of light is poor. To take out the brilliance of a gemstone it has to be cut and polished. For a diamond RBC (round brilliant cut) takes out its true worth.
When raw diamonds are cut and polished, a 'diamond dust' is released. It is collected and re-employed in the diamond polishing process.
Yes, a raw diamond will always test as a diamond.