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Three loose diamonds of different shapes

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-GROWN DIAMONDS

Our lab-grown diamonds are optically and chemically identical to natural diamonds. They also minimize environmental impact and allow you to maximize your budget.
SHOP LAB-GROWN 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 of diamonds?

The 4Cs include carat weight (size), color, clarity, and cut. They are the globally accepted standards used to assess the quality of the diamond. Cut refers to how well a diamond's facets interact with light; color measures the absence of color in traditional colorless diamonds, clarity assesses the presence of internal or external imperfections, and carat denotes the diamond's weight.

How are lab grown diamonds different from natural diamonds?

Origin and price: lab grown diamonds come from a lab, hence the name, while natural diamonds are mined from the earth. And since they require far fewer resources, lab diamonds are typically far more affordable than their natural counterparts. Lab diamonds are chemically and physically the same as natural diamonds.

What is diamond fluorescence, and does it affect the stone's appearance?

Fluorescence in diamonds refers to their tendency to emit a soft glow under ultraviolet (UV) light. This fluorescence usually appears blue. In most cases, fluorescence has a negligible effect on a diamond's appearance under normal lighting conditions. But keep in mind, that some diamonds with strong fluorescence, can have a hazy or oily appearance. Make sure to view diamonds in various lighting conditions to determine if fluorescence impacts their visual appeal.

How should I clean and care for my diamond jewelry?

To care for your diamond jewelry, make sure to store it in its original packaging, or a similar soft cloth pouch. This will help avoid scratching and other damage. Additionally, make sure to keep your diamond jewelry clean. Cleaning your diamond jewelry is similar to cleaning all your diamonds and other fine jewelry.

Take a small bowl and fill it with warm water and mild dishwashing soap. Now, let it soak for around 15 minutes and gently brush it using a soft bristle toothbrush. Then rinse with clean water, allow to air dry, and you're done!

Are colored diamonds natural and what gives them their color?

Yes! Colored diamonds, also known as "fancy color diamonds," occur naturally and come in various hues, including blue, pink, green, and yellow. They get their colors from different impurities or structural anomalies during formation. For instance, the presence of nitrogen can impart a yellow hue, while boron can cause a blue coloration. These diamonds are rare and often more valuable than colorless ones.

What is the significance of diamond certification?

A diamond certificate, or grading report, is an independent assessment of a diamond's characteristics, including the 4Cs. Provided by reputable laboratories like the Gemological Institute of America (GIA), these reports ensure transparency and trust in the diamond's quality. Purchasing a certified diamond gives you confidence in its authenticity and value.

How can I tell if a diamond is real or fake?

Determining a diamond's authenticity can be challenging without proper equipment. While there are DIY methods you can use at home, the most reliable method is to consult with a certified gemologist who can perform specialized tests to confirm that the diamond is genuine.

Do diamonds appreciate in value over time?

Certain rare diamonds may appreciate due to their uniqueness and demand, but generally, most diamonds do not significantly increase in value over time. The diamond market is influenced by various factors, including supply, demand, and market trends. When it comes to diamonds, it is recommended to buy diamonds primarily for their beauty and personal significance rather than as an investment.

What are conflict diamonds and how can I avoid them?

Conflict diamonds, also known as blood diamonds, are stones that are mined in war zones and sold to finance armed conflict against governments. To avoid purchasing conflict diamonds, ensure you are purchasing from a jeweler that complies with The Kimberley Process, which aims to prevent the trade of such diamonds. Request documentation confirming the diamond's ethical sourcing.

How does a diamond's cut affect its sparkle?

Cut has a significant influence on a diamond's sparkle. A well-cut diamond reflects light internally and externally, maximizing its dazzle. While, a poorly cut diamond allows light to escape from the sides or bottom, resulting in a dull appearance.

What is the difference between diamond shape and diamond cut?

Diamond shape refers to the outline or form of the stone (for example round, princess, oval), while cut is about the diamond's symmetry, proportions, and polish. Cut affects a diamond's ability to reflect light and its overall sparkle. Both factors are essential in determining a diamond's appearance and appeal.

Why are some diamonds more expensive than others?

A diamond's price is influenced by primarily the 4Cs: cut, color, clarity, and carat weight. The better a diamond ranks in these areas, the more expensive it will typically be. Other factors affecting price include certification, brand reputation, and market demand. Rarity, especially in larger carat sizes or unique colors, also plays a significant role in a diamond's cost.

What are inclusions in diamonds?

Inclusions refer to the internal characteristics or imperfections within a diamond, such as tiny fractures or the presence of foreign materials. They occur naturally during the diamond's formation. The size, number, position, and visibility of inclusions can affect a diamond's clarity grade and, consequently, its value.

How are diamonds graded for clarity?

Diamonds are graded for clarity based on the presence of internal inclusions and external blemishes. The Gemological Institute of America (GIA) clarity scale ranges from flawless (no inclusions or blemishes visible under 10x magnification), all the way to included (inclusions or blemishes visible to the naked eye).