A true diamond certificate, or grading report, is a detailed certification from independent gemologist organizations. The GIA (Gemological Institute of America) certifies diamonds, and is known as "The World's Foremost Authority in Gemology."
A diamond certificate will contain detailed information about your diamond. The color, cut, carat, weight and clarity will all be graded, and other characteristics such as florescence will also be listed in a diamond certificate. You may be required to purchase the diamond certificate when buying your diamond jewelry, but the cost is usually minimal, and you can then be certain that you are purchasing a quality piece of diamond jewelry.
Companies like Blue Nile sell certified diamonds that are certified by GIA or the American Gem Society Laboratories, and Diamond.com offers certified diamond jewelry.
Another advantage of purchasing certified diamond jewelry is if you ever decide to sell your jewelry, it will be much easier for you to place a value on it, as well as ease the purchaser's mind that the diamond jewelry is real. You can use the Diamond grading report to look up the wholesale value of the diamond in question, which will help you determine a sales price.
It is good practice to avoid diamond dealers who are reluctant to provide a certificate for a diamond, or diamond jewelry dealers that attempt to sell a piece for a higher price because of the certification. One of the oldest and most well known sources for high quality certified diamond jewelry is DeBeers, and another classic source for certified diamond jewelry and wedding rings is at Tiffany & Co.
For more information on certified diamonds and diamond jewelry, you can also visit adiamondisforever.com
Another avenue for buying certified diamond jewelry that is not as well known is online auctions. With a certification from GIA or other reputable organization, you can be sure that you are purchasing the "real diamond deal." And since it's an auction, there is a very good chance that you can purchase your diamond jewelry at a significant discount, or even at wholesale prices! Here are some examples of the beautiful certified diamond jewelry you can purchase right now at auction:
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 100ct Certified Princess Cut Diamond Engagement Ring US $2,599.00 |
 Fine 50ctw Aca Certified Diamond Sapphire Ring Gold US $1.00 |
 Fine 275ctw Aca Certified Diamond Emerald Ring Gold US $1.00 |
 Certified 120ctw White Black Diamond Ring 14k Gold US $1.00 |
 Solitaire 10ctw Aca Certified Diamond Ring 14k Gold US $1.00 |
 Anniversary 065ctw Aca Certified Diamond Band 14k US $1.00 |
 Solitaire 130ctw Aca Certified Diamond Ring With Guard US $1.00 |
 Aca Certified 125ctw Diamond Tanzanite Ring 14k Gold US $1.00 |
 Three Stone 25ctw Aca Certified Diamond Ring W Guards US $1.00 |
 Aca Certified 20ct Diamond Stud Earrings In White Gold US $1.00 |
 Solitaire 140ctw Aca Certified Diamond Ring 14k Gold US $1.00 |
 Solitaire 090ctw Aca Certified Diamond Ring 14k Gold US $1.00 |
 Famous 10ctw Aca Certified Diamond Ring Two Tone Gold US $1.00 |
 Aca Certified 345ctw Diamond Citrine Ring White Gold US $1.00 |
 Fine 325ctw Aca Certified Diamond Blue Sapphire Ring US $1.00 |
 Engagement 140ctw Aca Certified Diamond Ring 14k Gold US $1.00 |
 Famous 50ct Certified Diamond Eternity Band White Gold US $1.00 |
 Famous 085ctw Aca Certified Diamond Emerald Ring US $1.00 |
 Certified 85ctw White Black Diamond Ring White Gold US $1.00 |
 Necklace 902ctw Aca Certified Diamond Blue Sapphire US $1.00 |