Diadem or tiara of diamonds, gold, and silver with 25 five-point stars, graduated in size, set "en tremblant," containing 502 brilliants, 60 rose cuts; the central diamond of the largest star is 21.60 carats. By Estevao de Sousa, Lisbon, 1863-1866. Commissioned by Queen Maria Pia of Portugal (1847-1911). Both loaned by the National Palace of the Ajuda Museum, Lisbon.

JEWELRY GEMS

Riviere - a necklace "river" of diamonds. With 55 graduated diamonds, total weight 118 carats, set in silver on a gold chain. By Ambrosio Gottlieb Polett, Lisbon, second half of 18th century. Loaned by the National Palace of the Ajuda Museum, Lisbon.

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JEWELRY/GEMS

Part of the Aurora Collection of 260 naturally colored diamonds from worldwide sources representing the variety of fancy colors in diamonds. The stones range from 0.13 to 2.88 carats, and total 231.73 carats. Loaned by Aurora Gems, Inc., New York.

Diamond Color

Cut : Color : Clarity : Clarity Enhacement : Carat Weight : Certification : Caring : Diamond Shapes

Diamond Color
The color of a diamond depends on the quantity and nature of trace elements within the stone and how these elements originated. Most commercially available diamonds range in color from colorless to pale yellowish. There are other colors of diamonds known as "fancy diamonds" which can be pink, blue, green, yellow, brown and even black.

The GIA (Gemological Institute of America) provides a letter scale in which diamonds are graded based on their color. The following diagram illustrates the range of color grades:



NOTE: The colors on this chart are for demostration purposes only. Since all monitors display colors diferrently, what you see on this chart may not represent the exact color grade.

Diamonds that are graded in the D-F range are the rarest and consequently most valuable. In reality, diamonds in the G-K range have such a small amount of color that the untrained eye can not see it and as such offer a great value. In order to provide our customers with the finest possible selection of inventory, you will not find any diamonds rated below P in color on the web site. Fancy color diamonds are available in their own section and do not follow the letter grading conventions in the chart above.

Fluorescence
This characteristic of a diamond causes a slight blue glow when the stone is exposed to intense, direct ultraviolet light. This type of light can typically be found in nightclubs. A small amount of ultraviolet light comes directly from the sun.There are differing opinions on fluorescence and whether to avoid it or not. We believe it comes down to a matter of personal taste and does not affect the value of the diamond.

See The Diamond Before Paying

We believe that buying a diamond is a big decision and we want you to see your diamond in person before paying for anything. Learn more about how Yehuda.com works

Making Diamonds Look Better

Now you can afford the largest, most beautiful diamonds you've dreamed of thanks to the Yehuda diamond clarity enhancement process.

Browse Online, Buy In Person

Select any two clarity enhanced loose diamonds or pieces of finished diamond jewelry from our site and complete an online request. You will then receive an email with the contact information of the authorized Yehuda jeweler in your area. Give them a call and schedule an appointment. When we receive notice from the jeweler that an appointment has been scheduled, we will ship the exact diamonds you requested. Then on the day of your appointment, you can drop in to your local jewelry store and see the diamond face-to-face, touch it, inspect it with a jeweler's loupe and compare it to other more expensive non-enhanced diamonds.

If you decide to buy one of the diamonds we sent, you will pay the low internet price you see online, but get a knowledgable local jeweler's service to answer questions, mount the diamond, size the ring and complete your purchase.