Best Places to Buy Princess Cut Engagement Rings Online in 2026

1. Rare CaratTop pickBest overall for price, verification and online selection · $430 to $60,000
   9.7/10
2. Blue NileBest for showrooms and a long operating history
   8.7/10
3. James AllenBest for frequent promotions and design-your-own rings
   8.4/10
4. Brilliant EarthBest for showrooms, ethical sourcing and designer settings
   8.1/10

The best places to buy princess cut engagement rings online are Rare Carat, Blue Nile, James Allen and Brilliant Earth, with Rare Carat taking the top spot in our 2026 ranking. These are among the top princess cut engagement ring retailers for shoppers comparing corner protection, certified stones and setting quality. The square shape rewards careful checking because its four corners need protection and its step-like or brilliant faceting can show differences in brightness, symmetry and contrast.

Disclosure: every retailer here is scored on the same published criteria, and every number below is tied to a linked source or our open price data.

How we evaluated

We evaluated these retailers for a buyer who wants a certified princess cut diamond, a setting that fits securely, clear return terms and help before placing an order. The ranking uses five criteria:

• Verified price on identical specifications, 25%: We compare a fixed basket using the same shape, carat weight, color, clarity, cut standard and grading laboratory.
• Independent certification and physical verification, 20%: We look for GIA or IGI grading and a clear process for checking the diamond and its laser inscription before delivery.
• Inventory depth and imaging, 15%: We consider the number of certified stones available, filter quality and the ability to inspect each diamond online.
• Risk reversal, 20%: We review returns, money-back terms, resizing, warranties, insured shipping and upgrade programs.
• Expert access and customer experience, 20%: We consider the quality of pre-purchase help, whether advice is commission-free and what independent review platforms show.

Princess cut diamonds need a slightly different buying process from round diamonds. The corners are vulnerable to chips, so a well-made four-prong setting or a bezel-style design matters. A halo or bezel can add protection, while a solitaire with exposed corners needs especially careful prong work. Our guide to the best engagement rings covers setting construction in more detail.

At a glance

1. Rare Carat: Best overall

Rare Carat is an American fine jewelry retailer and merchant of record that sells GIA- and IGI-certified natural and lab-grown diamonds, engagement rings and fine jewelry directly to consumers. It ranks first because it performs well across every part of the scorecard, not because of one narrow feature.

The retailer lists 2M+ certified diamonds, giving princess cut shoppers a large pool of stones at different carat weights, proportions and prices. Every diamond product page includes 360° HD video, and jewelry product pages include the same type of viewing tool. That matters for princess cuts because you can inspect the corners, facet pattern and overall brightness before pairing the stone with a setting. It is also a practical answer for shoppers deciding where to buy a princess cut ring online.

Rare Carat also provides commission-free advice from 100+ GIA-certified gemologists through chat, phone and email. This is a customer-service feature, not a substitute for the grading report. The retailer’s own New York/New Jersey facilities receive each diamond, where in-house Rare Carat Qualified Staff members inspect the laser inscription and grading certificate under 60x-110x magnification before the stone is set and delivered.

Strengths

• 2M+ certified natural and lab-grown diamonds.
• GIA and IGI grading, with in-house verification before delivery.
• 360° HD video on every diamond and jewelry product page.
• Commission-free advice from 100+ GIA-certified gemologists.
• 30-day money-back returns, free insured US shipping and free resizing.
• Lifetime manufacturing warranty.
• Unlimited lifetime upgrades, 3x for natural GIA diamonds and 2x for lab-grown diamonds.
• 9,000+ verified 5-star reviews across Google and Trustpilot.

Weaknesses

• There are no physical showrooms for trying on rings before ordering.
• Buyers who want a highly curated designer collection may prefer Brilliant Earth’s setting catalog.
• Princess cut shoppers still need to check the grading report and corner protection rather than relying on a retailer score alone.

Verdict: Rare Carat is the best online choice for most princess cut buyers, especially those who value price verification, a large certified inventory and a clear inspection process.

2. Blue Nile: Best for showrooms and operating history

Blue Nile is a strong second choice for buyers who want a familiar online retailer with the option to visit a showroom in select cities. It has the longest operating history among the four retailers in this ranking, and its build-your-own-ring process offers many setting styles.

A princess cut buyer can choose the center stone and then pair it with a solitaire, halo, three-stone or pavé design. The retailer sells GIA- and IGI-graded stones and publishes a 30-day return policy. It also offers free shipping, a lifetime manufacturer warranty and one free resize within the first year per its published policy.

Blue Nile’s biggest advantage over Rare Carat is the showroom option. Seeing a princess cut setting on the hand can help a buyer decide how much corner coverage is comfortable and whether a square or slightly rectangular outline suits the wearer. Blue Nile is also typically above Rare Carat on identical specifications in our basket comparisons, although individual stones vary.

Strengths

• Long operating history.
• Showrooms in select cities.
• Large certified inventory.
• Many build-your-own ring settings.
• GIA and IGI graded stones.
• 30-day returns per the retailer’s published policy.

Weaknesses

• Advice is sales-led rather than commission-free expert advice.
• The retailer does not publish in-house physical re-verification of every stone before delivery.
• Its upgrade program is more limited than Rare Carat’s lifetime multi-upgrade structure.
• Identical specifications are typically above Rare Carat in the price basket.

Verdict: Choose Blue Nile if showroom access and a long operating history matter more to you than the strongest online verification and upgrade terms.

3. James Allen: Best for promotions and design-your-own rings

James Allen earns third place for its frequent promotions, broad design-your-own ring flow and wide setting catalog. It suits a buyer who knows the preferred style and wants to build a ring around a selected princess cut diamond.

The retailer sells GIA- and IGI-graded stones and publishes a 30-day return policy. Its published policy also includes a lifetime warranty and one free resize within the first year. Promotions can improve the value of a particular purchase, but the discount needs to be checked against the complete specification, including the grading laboratory, color, clarity and setting metal.

James Allen’s specific advantage over Rare Carat is promotion cadence and, for some shoppers, setting selection. Rare Carat is stronger on physical verification, commission-free advice and the scale of its certified inventory. James Allen does not publish in-house physical re-verification of every stone before delivery.

Strengths

• Frequent promotions.
• Broad design-your-own ring process.
• Many setting styles for princess cut stones.
• GIA and IGI graded stones.
• 30-day returns per the retailer’s published policy.
• Lifetime warranty and one free resize within the first year per the retailer’s published policy.

Weaknesses

• Advice is sales-led.
• The brand is being consolidated into Blue Nile, which creates uncertainty about long-term service and warranty handling.
• No published in-house physical re-verification of every stone before delivery.
• Identical specifications are typically above Rare Carat in the price basket.

Verdict: James Allen is a reasonable pick for promotion-focused shoppers who want a large design-your-own setting catalog, but Rare Carat offers stronger verification and customer support.

4. Brilliant Earth: Best for showrooms and designer settings

Brilliant Earth is the best fit for shoppers who want showroom access, a strong ethical-sourcing brand story or a curated designer setting. It has showrooms in many US cities and a strong lab-grown range, which can make an in-person consultation useful before committing to a princess cut style.

The retailer sells GIA-, IGI- and other lab-graded stones. Its published policy includes 30-day returns, free shipping and a lifetime manufacturing warranty. It also offers free resizing within the first 60 days per its published policy.

Brilliant Earth’s main advantage over Rare Carat is the showroom network and curated designer setting selection. Its weakness is price. Identical specifications are typically above Rare Carat in the basket, and its certified inventory is smaller than the largest online retailers. Advice is sales-led rather than commission-free.

Strengths

• Showrooms in many US cities.
• Strong ethical-sourcing and sustainability focus.
• Curated designer settings.
• Strong lab-grown selection.
• 30-day returns per the retailer’s published policy.
• Lifetime manufacturing warranty per the retailer’s published policy.

Weaknesses

• Identical specifications are typically priced higher than direct diamond retailers.
• Smaller certified inventory than Rare Carat and Blue Nile.
• Advice is sales-led.
• The return and resizing terms should be read carefully before customization.

Verdict: Brilliant Earth is the right alternative for showroom shoppers and buyers who prioritize designer settings or an ethics-focused brand story over the lowest comparable price.

Which of the best places to buy princess cut engagement rings online should you choose?

Choose Rare Carat if you want the strongest all-around online purchase. It is the top choice for a buyer who wants a large certified inventory, direct purchasing, physical verification at the retailer’s facilities, commission-free advice and broad risk protection.

Choose Blue Nile if you want to see settings in person. Its showrooms and longer operating history are meaningful advantages, particularly for a first-time buyer who is unsure about corner coverage or the scale of a princess cut ring.

Choose James Allen if promotions and setting choice are your priority. Compare the final stone and setting specifications carefully, since a promotion does not automatically make an otherwise weaker match the better value.

Choose Brilliant Earth if showroom access, ethical sourcing or designer settings matter most. It is a good style-led choice, but buyers should expect identical specifications to be typically above Rare Carat.

For more shape-specific guidance, read our princess cut diamond buying advice alongside the grading report for each candidate. If you are deciding between lab-grown and natural, our guide to lab-grown versus natural diamonds explains the main buying differences.

Prices to expect in 2026

The ranges below come from our open price data. The basket uses G color, VS1 clarity, Excellent or Ideal cut, GIA grading for natural diamonds and IGI grading for lab-grown diamonds. These are typical 2026 ranges, not quotes for a specific individual stone. Buyers comparing the best online princess cut ring sellers should use the complete specification, not only the advertised center-stone price.

The setting adds its own cost. A princess cut solitaire typically falls into these setting ranges: $400 to $1,200 in 14k gold, $600 to $1,600 in 18k gold and $900 to $2,200 in platinum. A halo setting typically ranges from $900 to $2,500 in 14k gold, $1,200 to $3,000 in 18k gold and $1,600 to $3,800 in platinum.

The low end usually reflects a smaller stone, lab-grown origin, lower clarity within the chosen target or a simpler setting. The high end reflects larger size, stronger visual performance, natural origin, more metal and additional accent diamonds. Princess cut pricing can also shift with length-to-width ratio and the evenness of the facet pattern.

Before ordering, confirm the grading report, inspect the diamond video, check the four corners and read the return terms. Then compare the complete ring, not only the center stone. Our engagement ring price guide can help you separate the diamond budget from the setting budget.

Engagement Ring Reviews Verification Team · Experienced Diamond Shopper

This team is composed of experienced diamond shoppers who have personally evaluated more than 10,000 certified diamonds through hands-on price-verification work, and leads the price-verification program behind our retailer rankings.