DIAMOND TUTORIALS
A Diamond is a form of carbon that crystallizes in the crystal system of highest symmetry known as the cubic system born
hundreds of miles underneath the surface of the earth. It possesses a hardness far surpassing that of any other substance
known in nature with 100 years in the making of it's formation.jewelry information, Diamond Tutorials, high end jewelry
business information Diamonds were formed more than 70 million years ago when diamond-bearing ore was brought to the surface
through volcanic eruption. After the magma cooled, it solidified into blue ground, or kimberlite, where the precious rough
is still found today. The durability of a gem depends on both its hardness and toughness. Diamond, although highest on the
scale of hardness (rated 10 on the Mohs scale), is not as tough as some gems because of its good cleavage. (Cleavage is
the tendency of a diamond to split in certain directions where the carbon atoms are furthest apart.) Diamonds have a very
high degree of transparency, refractivity and dispersion or 'fire' which gives rise in cut diamonds to a high degree
of brilliancy and a display of prismatic colors. A diamond's fiery brilliance makes it cherished above all other gemstones
by the majority of people. Diamonds occupy a position of incomparable demand.
See also
Diamond Sizes
DIAMOND SHAPE
Round
The Classic Cut: the vast majority of diamonds sold are rounds. The traditional choice for all occasions and preferred by
many for their personal investment portfolio. The depth percentage should range between 58 to 63 percent and the table percentage
should range between 55 to 64 peercent. The most desired percentages are the 60 percent, and perfectionists will look for
depth of 59 through 62 percent and table of 56 through 58 percent.
Marquise
The Marquise Cut takes its name from a legend relating to the Marquise of Pompadour. According to the legend, the Sun King
desired a stone to be polished into the shape of the mouth of the Marquise. It is generally agreed that a legnth-to-width
ratio between 1.75:1 to 2:1 is most pleasing. As with other fancy shapes, the consumer's individual taste constitutes an
element of the evaluation as well. The typical marquise diamond contains 56 facets.
Princess
The Princess Cut Diamond ia a brilliant style shape with sharp, uncut corners. It is typically cut square rather as a rectangle.
Brilliant style refers to vertical direction crown and pavilion facets instead of step style horizontaled facets. A princess
Cut Diamond generally has 76 facets, giving it more brilliance and fire than the round brilliant. The Princess Cut diamond
is fast becoming one of the most popular cuts in the United States.
Radiant
The Radiant Cut Diamond is a staight-edged rectangular or square stone with cut corners. The radiant cut diamond has 62-70
facets. Radiants are principally used for important center stones primarily for rings but also for pendant. They are rarely
used for earrings or as side stones because they are hard to calibrate and match. To get matched pairs you may have to sort
through a hundred stones or recut to calibrate.
Emerald
An Emerald cut diamond shape is usually rectangular.The flat planes of the outside edges allow for a variety of side stones
shapes. Typical pairings would be two or three side baguetts,two half-moons,and other smaller emeralds,but not trillions
,as their sparkle makes the center emerald cut look flat. The length-to-width ratio should be between 1.5:1 to 1.75:1.
Pear
The pear shaped brilliant diamond is based upon the traditional configuration of the round brilliant diamond.More than other
fancy shapes,length-to-width ratio is a matter of taste when it comes to pear shaped diamonds.Because pears may be used
for engagement rings,suites in necklaces, dangles in earrings, and integral parts of custom designs, a wide variety of shapes
is considered desirable. The typical pear shaped diamond will contain 58 facets.
Oval
The oval cut diamond is based upon the traditional configuration of the round brilliant diamond and that's why its technical
name is oval modified brilliant diamond. The oval was invented by Lazare Kaplan in the early 1960s. A length-to-width ratio
of 1.5:1 is almost universally considered a pleasing shape for oval diamonds, with any variation beyond 1.4:1 or 1.6:1 beginning
to be noticeable and become an aesthetic issue. However as with all fancies, a certain degree of individual taste is always
factored into the desirability of a particular diamond's shape. Fifty-six facets are typical for oval brilliant diamonds.
Over the last year or two ovals have become very popular as center diamonds for engagement rings.
Heart
Heart Romantic perfection for the special occasions. The perfect stone for the special occasion requirements. The Heart
shaped brilliant is the hit item on Valentines day. Usually the width will be 10% wider than the head-to-point length.