The world's finest ethically-sourced diamonds.
Over 500,000 certified stones, curated by experts since 1967.
Loose diamonds are unmounted, certified gemstones sold individually before being set into jewelry. Buying a loose diamond gives you complete control over quality, cut, and value — ensuring your engagement ring, pendant, or earrings feature exactly the stone you desire. At RockHer, every loose diamond is hand-selected, GIA or IGI certified, and ethically sourced through our transparent supply chain.
The largest selection of GIA and IGI certified loose diamonds available online, updated in real-time.
Every diamond meets our strict ethical standards — beyond the Kimberley Process with full supply chain transparency.
ROSI, our AI gemologist, compares thousands of stones to find you the best diamond at the best price.
Our gemologists personally review every diamond to ensure only top-quality stones make it to our collection.
For the connoisseur who seeks something truly unique. Each of these rare cuts is hand-selected and individually certified — a collector's choice.
The GIA's 4C's — Cut, Color, Clarity, and Carat — are the universal standard for evaluating diamond quality. Mastering these will help you find the best loose diamond for your budget.
The most important C. A diamond's cut determines how well it reflects light, creating the sparkle and fire that make diamonds so captivating. Ideal and Super Ideal cuts maximize brilliance.
Learn about cutDiamond color is graded on a scale from D (colorless) to Z. The less color a diamond has, the more rare and valuable it is. Grades D–F are considered colorless and most desirable.
Learn about colorClarity measures the absence of inclusions and blemishes. Grades range from FL (Flawless) to I3. VS2 and above are considered eye-clean, offering excellent value.
Learn about clarityCarat refers to a diamond's weight. One carat equals 0.2 grams. While larger diamonds are rarer and more valuable, cut quality often matters more for visual impact than carat weight alone.
Learn about caratBoth natural and lab-grown diamonds are real diamonds with identical physical, chemical, and optical properties. The choice is personal — here's what sets them apart.
Formed over billions of years, deep within the Earth
Grown using advanced technology, identical properties
ROSI is our proprietary AI gemologist that analyzes every diamond in our inventory. She evaluates cut quality, value, and beauty beyond what a certificate can tell you — saving you time, money, and guesswork.
Diamond prices vary based on the 4C's, shape, and whether the stone is natural or lab-grown. Here's a general guide to help you understand what to expect at different carat weights.
| Carat Weight | Natural (G-H, VS2) | Lab-Grown (G-H, VS2) | Best For |
|---|---|---|---|
| 0.50 ct | $800 – $2,000 | $300 – $700 | Petite engagement rings, earrings |
| 1.00 ct | $4,000 – $12,000 | $800 – $2,500 | Classic solitaire engagement rings |
| 1.50 ct | $7,000 – $20,000 | $1,200 – $4,000 | Statement engagement rings |
| 2.00 ct | $12,000 – $40,000 | $2,000 – $7,000 | Luxury engagement rings, pendants |
| 3.00 ct+ | $25,000 – $100,000+ | $3,500 – $15,000 | Collector pieces, heirloom jewelry |
Prices are approximate and vary by shape, cut quality, and market conditions. Use our diamond search for live, up-to-date pricing.
Every RockHer ring is made to order. Choose your perfect loose diamond, select a setting, and we'll craft a ring that's uniquely yours.
Browse our collection of over 500,000 certified loose diamonds.
Pick from hundreds of handcrafted ring settings in platinum, gold, or rose gold.
Our master jewelers hand-set your diamond and finish your ring to perfection.
See exactly what you're paying for. Every loose diamond comes with a GIA or IGI certificate detailing its exact specifications.
Buying loose often costs less than pre-set jewelry because you control the diamond selection and setting separately.
Pair any loose diamond with any setting style. Create a truly one-of-a-kind piece that reflects your personal taste.
High-quality loose diamonds, especially natural stones with top grades, can retain and even appreciate in value over time.
Our 360-degree viewer, HD photography, and ROSI analysis let you examine every facet before making a decision.
A loose diamond can be reset into different jewelry pieces over generations — from engagement rings to pendants and beyond.
Master the fundamentals of diamond quality with our comprehensive guide to Cut, Color, Clarity, and Carat.
Read the guideEverything you need to know about lab-created diamonds: how they're made, grading, pricing, and value.
Read the guideFrom D to Z: learn how color grades affect a diamond's appearance and value, and which grade is right for you.
Read the articleThe science behind diamond brilliance, fire, and scintillation, and why cut quality matters most.
Read the articleHow RockHer ensures every diamond is ethically sourced, conflict-free, and traceable through our supply chain.
Read the articleBrowse our complete library of diamond guides, tutorials, and expert insights.
Education centerA loose diamond is a diamond that has been cut and polished but not yet set into jewelry. Buying a loose diamond allows you to inspect and evaluate the stone on its own merits — its cut, color, clarity, and carat weight — before choosing a setting. This gives you maximum control over quality and value.
In most cases, yes. Buying a loose diamond and selecting your setting separately often results in a better value compared to purchasing pre-set jewelry. You have more flexibility to allocate your budget between the stone and the setting, and you can choose exactly the quality level that matters most to you.
GIA (Gemological Institute of America) is the most widely recognized grading laboratory for natural diamonds. IGI (International Gemological Institute) is the leading lab for lab-grown diamonds. Both provide detailed reports on a diamond's 4C's, but GIA is generally considered the gold standard for natural stones, while IGI has become the industry standard for lab-grown.
Diamond shape is largely a matter of personal preference. Round brilliants offer maximum sparkle and are the most popular choice. Oval and cushion cuts provide a unique look while still delivering excellent brilliance. Emerald and Asscher cuts have a different, more architectural beauty with step-cut facets. Consider the wearer's style and the type of setting you plan to use.
ROSI is RockHer's proprietary AI-powered gemologist that analyzes over 50 data points per diamond to evaluate quality, beauty, and value beyond what a standard certificate reveals. ROSI has saved our customers over $1,000,000 by identifying the best stones at the best prices.
Yes. Lab-grown diamonds have the exact same physical, chemical, and optical properties as natural diamonds. They are made of pure carbon crystallized in the same cubic structure. The only difference is their origin: natural diamonds formed in the Earth over billions of years, while lab-grown diamonds are created in controlled environments using advanced technology.
Yes. RockHer offers both natural and lab-grown fancy color diamonds in a wide range of hues including yellow, pink, blue, green, and more. Browse our natural fancy color or lab-grown fancy color collections.
RockHer offers free returns on all loose diamonds. If you're not completely satisfied with your purchase, you can return it for a full refund within our return window. We also offer free insured shipping on all orders.
Over 500,000 GIA and IGI certified diamonds. AI-powered recommendations. Expert support. Start your search today.
