P. Hirani Diamond Kurla, Mumbai, Maharashtra

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. COLOUR 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 COLOUR 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.

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. Source: NCDIA

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 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.   COLOUR 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 modifi ed by an orange, brown or purplish color.   STRENGTH OF COLOUR   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 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.       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.   COLOUR 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 COLOUR   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.

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 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.   COLOUR 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 COLOUR   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 powerful color of the sea and the sky meet in these ex- ceptional gems. Blue diamonds are considered extremely rare and mysterious. They range from the light blue sky of a winters day to the deep blue of the ocean.     The Cullinan mine and Golconda region are the most notable areas where blue diamonds have come from. The most famous blue diamond in history is the 45 carat Hope Diamond. In 2008 The Wittelsbach Diamond, a 35.56 carat ushion-shaped fancy deep blue, was purchased at auction for $24 million. Experts compare this stones color and characteristics to the famed Hope Diamond.   COLOUR FORMATION   The vast majority of blue diamonds owe their color to the presence of boron. The bonding of boron to carbon causes absorption in the red, yellow and green parts of the spectrum producing a blue color. Blue Diamonds may contain a gray, violet or greenish modifying color.   STRENGTH OF COLOUR   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 mine is in particular the biggest source of fancy pink diamonds, fancy color diamonds which attract on average more than 20 times the price of equivalent white diamonds. The mine is the only known significant source of pink diamonds, making up over 90% of the world’s supply. Argyle Pink Diamonds is a branch of the business with its headquarters in Perth, where its state of the art cutting and polishing facilities are also based. The rare fancy pink color diamonds are all cut, polished and sold as loose gemstones to a range of international customers.