Brown Diamonds
From subtle champagnes to rich cognacs, brown diamonds are the new classic. Their golden tones make them a softer, gentler alternative to the colorless diamond, and their neutral color makes them the perfect choice for fashion jewelry with a contemporary feel.
brown Origin
Brown Diamonds are found in Southern Africa, Siberia and Australia. The Argyle Diamond Mine in Western Australia is the world's largest producer of these stones.
Color Formation
Diamonds become brown when heat and pressure deep within the earth cause the crystal lattice to distort. These distortions cause Brown Diamonds to absorb a continuum of wavelengths increasing toward the blue region of the spectrum and hence imparting a brown color. This can often be seen as in parallel bands within the diamond. Brown Diamonds may be modified by an orange, yellow or pink color.
STRENGTH OF COLOR
The strength of color is one of the most important factors in determining the value of a natural color diamond. The value of a natural color diamond increases with the intensity of the most prominent color within the diamond.
The Argyle Diamonds C1 to C7 color scale below remains the most widely used color scale for brown diamonds.
C-1
C-2
Light Brown
C-3
C-4
Medium Brown
C-5
C-6
Light Brown
C-7
Deep Brown
CHAMPAGNE | LATTE | COGNAC
Orange Diamonds
The majority of orange diamonds come from Africa. The interest in this color surged in 1997 with the auction of the Pumpkin Diamond, so named by the buyer Ronald Winston as it was purchased the day before Halloween. The 5.54 carat vivid orange diamond, was at the time the largest vivid orange diamond ever found.
orange ORIGIN
The vast majority of all diamonds contain some nitrogen. In orange diamonds the nitrogen atoms have grouped themselves in a very specific way. This happens during and right after the diamond is formed. These nitrogen arrangements absorb light in the blue and yellow region of the spectrum producing an orange color. Orange Diamonds may contain a brown, yellow or pinkish modifying color.
Color Formation
The vast majority of all diamonds contain some nitrogen. In orange diamonds the nitrogen atoms have grouped themselves in a very specific way. This happens during and right after the diamond is formed. These nitrogen arrangements absorb light in the blue and yellow region of the spectrum producing an orange color. Orange Diamonds may contain a brown, yellow or pinkish modifying color.
strength of color
The strength of color is one of the most important factors in determining the value of a natural color diamond. The value of a natural color diamond increases with the intensity of the most prominent color within the diamond.
TANGERINE | PUMPKIN | AMBER
Yellow Diamonds
Yellow diamonds capture the suns rays like no other gemstone. The dramatic and brilliant glow of these diamonds makes them a red carpet favorite among celebrities, and as a result, they are the most widely known of colors.
Yellow Origin
The most notably large and intense yellow diamonds have been discovered primarily in South Africa. The Allnatt, a 101ct cushion shape fancy vivid yellow diamond is perhaps the most signifi cant yellow diamond in history, named after its original owner Major Allnatt in the 1950s. One of the largest polished diamonds in the world is the Incomparable, a 407ct internally flawless brownish yellow diamond.
Color Formation
The vast majority of all diamonds contain some nitrogen. In most yellow diamonds the nitrogen atoms have grouped themselves in very specific ways. This happens during and right after the diamond is formed. These nitrogen arrangements absorb light in the blue region of the spectrum producing a yellow color. Yellow diamonds can contain an orange, green or brown modifying color.
strength of color
The vast majority of all diamonds contain some nitrogen. In most yellow diamonds the nitrogen atoms have grouped themselves in very specific ways. This happens during and right after the diamond is formed. These nitrogen arrangements absorb light in the blue region of the spectrum producing a yellow color. Yellow diamonds can contain an orange, green or brown modifying color.
LOMON| DANDELION |CANARY
GREEN DIAMONDS
Pure green diamonds are extremely rare and highly valued, ranging from light mint greens to vivid grass greens. Only a handful of natural green diamonds are introduced into the market each year making green diamonds some of the most sought after of all natural color diamonds.
green Origin
Green diamonds are found predominately in regions of Africa and South America. The Dresden Green is the most famous green diamond. Weighing approximately 41 carats, it is often referred to as the cousin of the Hope Diamond for its historical importance. predominately in regions of Africa and South America. The Dresden diamond. Weighing approximately 41 carats, it is often referred to as the cousin of the Hope Diamond.
Color Formation
Unique among natural color diamonds green diamonds acquire their color after their trip to the earths surface when they rest in the ground near naturally occurring radiation. This radiation pushes into the diamond causing absorption in the red and yellow regions of the spectrum producing a green color. Green Diamonds can contain a yellowish, bluish or grayish modifying color.
strength of color
The strength of color is one of the most important factors in determining the value of a natural color diamond. The value of a natural color diamond increases with the intensity of the most prominent color within the diamond.
MINT | GRASS| FOREST
Pink Diamonds
Pink diamonds range from delicate pastel to deep raspberry, Pink Diamonds are the most feminine of colors and are typically associated with romance. These extremely rare diamonds have long been revered by Hollywood stars and today are the hot favorite of collectors and connoisseurs.
PINK ORIGIN
Pink diamonds have only been found in a few mines across the world. The rich Golconda region in India and the Minas Gerais region of Brazil produced notable diamonds in the 17th and 18th centuries. Today, the Argyle mine in Western Australia is the source of the vast majority of the worlds supply. It is famous for generating the hugely coveted full-bodied hot pink diamonds.
Color Formation
Diamonds become pink when heat and pressure deep within the earth cause the crystal lattice to distort. These distortions cause Pink Diamonds to absorb green light and hence impart a pink color. This can often be seen as in parallel bands within the diamond. Pink Diamonds may be modified by an orange, brown or purplish color.
strength of color
The strength of color is one of the most important factors in determining the value of a natural color diamond. The value of a natural color diamond increases with the intensity of the most prominent color within the diamond.
BUBBLEGUM | RASPBERRY | MERLOT
Others
Virtually every color, shade and hue the mind can imagine, nature has created within a marvelous natural color diamond. The range of color varieties is almost inexhaustible but NCDIA is committed to present, on a continuing basis, the full range of color categories expressed by these wonderful natural creations.
Red Diamonds
Red diamonds are extremely rare. Basically they are very strongly and deeply colored pink diamonds, with the same cause of color, crystal distortion. This combination is so rare that most jeweler and diamond dealers have never even seen a natural red diamond. They do not get large with the 5.11 carat Moussiaf Red shield being the largest known red.
Purple Diamonds
Purple diamonds are very rare. It is believed that they have a similar cause of color as pink diamonds; crystal distortion. They are most often found in Siberia and are generally small in size. There are no historical or famous purple diamonds. This may be due to their inhospitable location. Purple diamonds larger than 5 carats are extremely rare, and their color rarely reaches the intense and vivid color grades.
Violet Diamonds
Violet diamonds are very rare. The vast majority come from the Argyle mine, the same mine that most strongly colored pink diamonds are found. Their color is related to Hydrogen, but the exact mechanism is as yet unknown. They are often very small and diamonds greater than 1 carat are extremely rare. Their color usually has a gray component, diamonds of a pure violet color represent less than 10% of all violets. The number of intense and vivid violet diamonds mined each year could be counted on one hand.
Olive Diamonds
Olive diamonds are often confused with green diamonds, but they populate a different and discrete area of color space. Their color is a combination of yellow and green sometimes also a bit of brown or gray. They often come with three colors to describe them such as brownish greenish Yellow, and while this does accurately describe the color olive is a simpler, more concise term. They can range is size from small to large (some are 10+ carats). Occasionally they exhibit a color change when heated or left in the dark, these are known as chameleon diamonds.
Black Diamonds
Natural color black diamonds are rare. Their color is due to dark inclusions within the diamond, usually made up of graphite. It is rare that they are large, but the most famous black diamond, the Black Orloff, is 67.50 carats. Usually they are opaque and much of their beauty is the bright, adamantine luster that reflects light off the surface. Often used as melee in fashion jewelry in combination with colorless diamonds black diamonds are becoming very popular.
White Diamonds
Natural color white diamonds are not colorless, but are actually white. This can often cause confusion as the term is used loosely. A pure white diamond has a translucency or even opacity that makes the diamond white. This is often caused by sub-microscopic inclusions. They occasionally exhibit a weak play of color (similar to opals) called opalescence. These are highly prized among conniseurs.
Gray Diamonds
Gray diamonds are often steely in appearance and to an untrained eye may be hard to distinguish from colorless diamonds. When viewed side-by-side the difference is obvious, a gray diamond is darker than a colorless one. Pure gray diamonds are rare and are frequently described as a masculine color diamond.
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