Different part of diamond
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| Diameter | The width of the diamond as measured through the girdle. |
| Table | This is the large, flat top facet of a diamond. |
| Crown | The upper portion of a cut gemstone, above the girdle. |
| Girdle | The narrow rim of a diamond that separates the crown from the pavilion. It is the largest diameter to any part of the stone. |
| Pavilion | The lower portion of the diamond, below the girdle. It is sometimes referred to as the base. |
| Culet | The tiny facet on the pointed bottom of the pavilion. |
| Depth | The height of a diamond, from the culet to the table. |
DIAMETER
TABLE
Upper facet of a diamond. It is the biggest facet of a diamond when viewed face up
CROWN ANGLE
is the angle of the crown facets to the diameter of the stone. The perfection of the
crown angle aids in the scintillation and the brightness of the diamond seen to the naked eye.
Crown Angle on a Round Brilliant Cut Diamond
GIRDLE
is the area where the crown facets and the pavilion facets of the diamond meet. Round Brilliant Cut Diamond Girdle, Medium Thickness
Faceted Diamond Girdl
CULET
is the term used for the point / area where the pavilion facets meet. It is ideally pointed, but
sometimes to prevent damage to the culet, it is at times faceted. 
Pointed Culet on a Round Brilliant Cut Diamond
DEPTH
Depth is the height of the stone measured from the table to the culet
Different part of diamond