What to Look for When Buying a Loose Colored Diamond
A few things matter most when you shop for a loose colored diamond. Keep these in mind as you compare your options.
- Natural or lab-grown. Natural fancy colored diamonds are rare. Lab-grown colored diamonds are real diamonds made above ground. Each type looks beautiful, but they differ in price and rarity.
- Grading and disclosure. An independent report from a lab like GIA or IGI tells you the color, carat, and whether the color is natural or treated. Clear disclosure helps you know exactly what you are buying.
- Sourcing and origin. If ethical sourcing matters to you, look for country-of-origin details, certifications, traceability practices, and commitment to responsible sourcing throughout a jeweler’s supply chain.
- How you buy. You can buy a finished piece, bid on a rare stone at auction, or pick a loose diamond and design a setting around it.
- Price and how you pay. Like all diamonds, colored diamonds can range from a few hundred dollars to millions depending on a number of factors. Some places offer payment plans.
- Where and how you shop. You can shop online, in a regular store, or through a live sale. Support like virtual appointments or in-person help can make the choice easier.
The Best Places to Buy Loose Colored Diamonds
1. Brilliant Earth
Brilliant Earth is the best place to buy colored diamonds for many shoppers. It carries a wide selection of both natural and lab-grown colored diamonds, each independently certified and held to our rigorous quality and sourcing standards. And once you find the stone you want, you can set it into a finished ring or necklace in the same place.
Strengths
- Offers both natural and lab-grown colored diamonds in a range of hues, so you can match your budget and your style.
- Shares country-of-origin details and follows its Beyond Conflict Free™ and Pathway to Beyond Conflict Free™ sourcing standards for natural diamonds.
- Grades diamonds through independent labs, including GIA, IGI, HRD, and GCAL. Select natural diamonds also include a GIA Diamond Origin Report that matches the rough crystal to the finished diamond.
- Lets you easily design your own ring by picking a loose colored diamond, then pairing it with a ring setting through our design-your-own process.
- Lets you shop online or in person at 40+ showrooms in cities across the U.S., with jewelry specialists available 24/7 and virtual appointments.
Considerations
- Natural fancy-color diamonds are rare, so the most sought-after colors and sizes can sell quickly.
- A loose diamond set into a Design Your Own ring or necklace is made to order, so delivery time varies.
- Shop Natural Colored Diamonds | Shop Lab Colored Diamonds
2. Christie's
Christie's is a renowned art and luxury business that sells rare, high-value colored diamonds through live and online jewelry auctions and private sales. Its buyers are often collectors and investors bidding on one-of-a-kind stones and jewelry pieces.
Strengths
- Offers access to rare fancy-color diamonds, including vivid pinks and blues.
- Private sales give buyers the opportunity to engage in a targeted search for luxury diamonds and diamond jewelry.
- Known for record-setting sales of extraordinary diamond jewelry and loose stones. In November 2025, Christie's sold the 9.51-carat "Mellon Blue" diamond for about $25.6 million in Geneva.
- Provides provenance and history for many of its most notable stones.
- Typically provides GIA grading reports for its diamonds.
Considerations
- Colored diamonds are often sold through auctions, so the final price is set by bidding and can reach millions.
- Pieces are only sold as individual lots at auction or through private sales.
3. Etsy
Etsy is a global online marketplace where independent sellers list loose colored diamonds, both natural and lab-grown. You buy directly from each shop rather than from one company.
Strengths
- Offers a wide range of loose natural and lab-grown colored diamonds from many sellers in various shades. Many listings include a grading report from an independent lab.
- Backs qualifying orders with Etsy Purchase Protection, which can refund up to $250 of your purchase if an eligible issue arises, including an order that never arrives, arrives damaged, or does not match the listing.
- Lets you buy a loose stone to set yourself, with availability across a wide range of price points.
Considerations
- Certification, color treatment, and sourcing details vary from shop to shop, so you need to read each listing closely.
- Returns and exchanges depend on each seller's own policy.
How to Choose the Right Retailer for You
For many shoppers, Brilliant Earth is the best place to buy loose colored diamonds. We offer certified, traceable stones, a choice of natural or lab-grown, and the convenient option to set your chosen stone into a ring setting or necklace available through our design-your-own purchase process.
Christie's is a well-regarded option for collectors seeking rare, high-value stones at auction or through private sale. Etsy fits shoppers who want to browse loose stones from many independent sellers offering pieces at a wide range of price points.
Ask yourself these questions before you buy:
- Do you want a natural or lab-grown colored diamond?
- How important is knowing where the diamond came from?
- Do you want to set the stone through the same seller, or set it yourself later?
- What is your budget, and do you need a payment plan?
- Do you prefer to shop online, in a regular store, at a live sale, or through a marketplace?
The right loose colored diamond is the one that fits your style, your values, and your budget. Compare your options, ask the right questions, and choose with confidence.
