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A collection of different loose diamonds in every shape.

Loose Diamonds

Choose your perfect diamond and view it in 40x superzoom & 360° HD to start designing your dream engagement ring today

DESIGN YOUR OWN ENGAGEMENT RING

Begin by selecting one of our 500,000+ certified loose diamonds and pairing it with a beautiful setting.
A cellphone with an image of the James Allen loose diamond home page on the screen.
real-time
diamond inspection
Interact with your favorite loose diamonds in real time together with our non-commissioned diamond experts in 3 easy steps:
Choose your
favorite diamond
1
Look for the Real-Time
Diamond Inspection
button
2
Walk through every aspect
of the diamond with
our experts, available 24/7
3
GET STARTED
A hand with several different engagement ring styles on the ring finger.

LAB CREATED DIAMONDS

Our lab created diamonds are optically and chemically identical to earth created diamonds. They also minimize environmental impact and allow you to maximize your budget.
SHOP LAB CREATED DIAMONDS
A round True Hearts™  diamond on a background of pink and purple hearts.

TRUE HEARTS™ HEARTS
AND ARROWS DIAMONDS

Our True Hearts™ Hearts and Arrows diamonds are the ultimate in perfect cut and symmetry and have thus become a symbol of the purest expression of love.
EXPLORE TRUE HEARTS

CONFLICT FREE DIAMONDS

Each of our loose diamonds is guaranteed to be conflict free and certified by one of the top 3 grading laboratories: GIA, AGS or IGI.
Learn More

JAMES ALLEN GUARANTEE

FREQUENTLY ASKED QUESTIONS

What are the 4Cs?

The 4Cs include carat (size), color, clarity and cut, and are the globally accepted standards by the Gemological Institute of America (GIA) used to assess the quality of the diamond.

What are the advantages of buying a loose diamond online?

There are a plethora of benefits to buying loose diamonds online and it will almost always be the cheapest option. At James Allen you can inspect your diamond with a diamond and jewelry expert in real time, allowing them to help you make the best choice.

What size diamond is best for an engagement ring?

The most popular diamond size chosen for engagement rings is a 1.0 carat center stone. However, couples can opt for both smaller and larger diamonds. Another great and more affordable option at James Allen is lab created diamonds. Lab created diamonds are the next generation of diamonds that give you the benefit of purchasing a larger size diamond at a more affordable price.

What is the most popular diamond shape for engagement rings?

The round brilliant cut is the most popular choice of diamond for engagement rings, and currently accounts for 75% of all of the diamonds sold today. It’s known for its pristine reflection of light and firey brilliance.

Does the shape of a diamond affect its quality?

Generally, the shape of the diamond won't affect its quality, however the way a diamond is cut may impact the diamond's beauty, brilliance and value. Learn more about diamond cut here.

How can I tell the difference between a real diamond and a fake diamond?

There are several ways to tell. Some of them require an expert eye to identify imperfections. Ironically, imperfections indicate pure diamonds. The easiest way to tell if a diamond is real or fake is to drop it in a glass of water. Real diamonds will sink toward the bottom while fake diamonds will float around the middle or top.

What is a conflict free diamond?

Conflict free diamonds refer to diamonds that have been carefully selected for their ethical and environmentally responsible origins.

How important is diamond certification and what is it?

A Gemological Institute of America (GIA), American Gem Society (AGS), or International Gemological Institute (IGI) diamond certificate assures the value and quality of your diamond. GIA, AGS and IGI are the gold standard in diamond grading. Their reports detail key characteristics of each diamond.

How is a lab created diamond made?

Scientists start with a diamond seed - a small sliver of chemicals - then expose it to temperatures and pressures to make it grow just like a diamond under the ground. A carbon coating helps the diamond crystalize as it grows. The end result: the same chemical, physical, and optical properties as earth created diamonds. At James Allen, our strict quality control procedures ensure we offer only the finest diamonds.