Diamond Facets - Facets in a Round Brilliant Cut Diamond
While the diamond facets
count is standard and universally agreed, the actual proportions (crown
height and angle, pavilion depth, pavilion angle, and table size) have
Over the period of different types of round brilliant cuts have evolved. The modern "Round Brilliant Cut" was
developed by diamond-cutter Marcel Tolkowsky in 1919.
What is Brilliant Cut diamond?
Well, according to GIA guidelines, diamonds cuts are classified under 3 basic categories, i.e. - brilliant cut, step cut and mixed cut. In a brilliant cut diamond, facets are arranged in such a manner that they appear radiating outward.
to this facet arrangement, brilliant cut stones have more sparkle
compared to step and mixed cuts. Further, round is the most common shape
where brilliant cut style is incorporated. This article is about facets
arrangement of modern round brilliant cut which is the most common and popular
Round Brilliant Cut Diamond
How many facets does a diamond have?
"Facet" is the term used for a flat part
(surface between edges) of a cut and polished diamond. The modern round brilliant - popularly
known as the "Tolkowsky Cut" or "Tolkowsky Brilliant" - consists
of 58 facets (or 57 if the culet is excluded), 33 on the crown (the top half above the middle or girdle of the stone), and 25 on the pavilion (the lower half below the girdle).
may be polished smooth, or faceted. In recent times girdles are
generally faceted; many have 32, 64, 80, or 96 facets. These facets are
however excluded from the total facet count.
You may find small extra diamond facets on the crown or pavilion, which are created to remove inclusions during the diamond cutting process. These extra facets may affect the overall facets symmetry of the stone and is taken into consideration while cut grading.
Facets should be
aligned in such a manner that they enhance the reflection of light
through diamond. The symmetry, depth and size of facets affect the brilliance and sparkle of diamond. Facets also affect the lifespan of diamond.
Facets of a Diamond
As listed below, diamond facets are generally named according to
their location on different parts of the stone.
- Table Facet - It’s the top-most facet of the diamond
and is named after its location (located on table). In a round brilliant
cut diamond, table facet has octagonal shape. It is through this facet
that incident light is reflected back. Thus it’s the most important
facet of the diamond as it affects the diamond’s brilliance and sparkle.
- Star Facets - Just after table facet are the 8 star
facets. These facets are named Star because when the diamond is seen
from top, these facets form an eight point star.
- Kite/Bezel/Upper Main or Crown Facets - Just after star facets are 8 kite facets.
The position of these facets extends from the table to the girdle of
the diamond. These facets are shaped like a four-sided kite that’s why
termed as Kite facets. Also, since they are positioned on crown, they
are also called crown facets.
- Upper Girdle Facets -These facets are located between kite
facets and girdle. Since these facets are positioned on the upper side
of the girdle, they are called Upper Girdle facets. These facets are 16
- Pavilion Facets or Arrow Facets -These facets can be seen when diamond is
placed in table-down position. There are 8 Pavilion facets located on
underside of diamond. These facets connect from under the girdle. Since
positioned on pavilion they are termed Pavilion facets. These facets are
also termed as Arrow because of their shape.
- Lower Girdle Facets - These facets can be seen when diamond is
placed in table down position. There are 16 lower girdle facets located
on the underside of diamond connected with pavilion facets. These facets
are termed so because of their position on the lower side of girdle.
- Culet Facet - The culet refers to the "point" at the
bottom, which is actually not a point but a tiny facet. It can be said
as the lower-most facet when diamond is viewed from sideways.
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