An asscher cut diamond has a square outline, clipped corners and concentric step facets. Learn how to judge clarity, cut, price, durability and retailer policies.
How this entry was checked: facts are tied to a linked source or to our verified data sets; retailers are scored on the same published criteria. Pricing data provided by Rare Carat from its inventory feed, updated September 23, 2026. Other retailers' prices were verified September 17, 2026.
Asscher cut diamond means a square diamond with clipped corners and concentric step-cut facets. Its broad, open table reveals inclusions and color easily. Check the grading report, proportions, clarity, polish, symmetry and setting protection before purchase.
An asscher cut diamond is a square step-cut stone with clipped corners and concentric facets that create a geometric hall-of-mirrors effect.
The shape was developed in the early twentieth century and is strongly associated with Art Deco design. Its outline is square, but the four corners are cut away. The main facets are broad and arranged in parallel rows beneath the table. This makes the stone look architectural rather than sparkly in the way a round brilliant does.
Every fact in this entry is tied to a linked source or to our verified data sets, and every retailer named is scored on the same published criteria.
Asscher is a shape description, not a complete quality grade. A grading report still matters. It should identify the stone as an Asscher or square step cut and list measurements, carat weight, color, clarity, polish, symmetry and fluorescence where applicable. Read the report with the guidance in how to read a diamond grading report, then inspect the actual stone.
The defining visual feature is step faceting. These facets resemble nested frames or broad mirrors. A well-made stone can show bright flashes and a strong pattern of alternating light and dark areas. It will not have the dense, scattered sparkle of a round brilliant or many modified brilliants.
The large table exposes the center of the diamond. Inclusions that remain hidden in a brilliant-cut stone can be visible in an Asscher. Clarity therefore has unusual practical importance. A report grade alone does not prove that a stone is eye-clean. View the listing images and 360° HD video, and ask for additional information if the center contains a cloud, crystal, feather or other characteristic.
Color is also easier to see. Step cuts often show body color through their open facets, especially in larger sizes. A colorless appearance depends on the stone, its setting and the viewer’s tolerance. Compare stones under consistent lighting rather than relying only on a single grade.
The outline should be close to square, but exact proportions vary. Divide the longer measurement by the shorter measurement on the report. A result close to 1.00 produces a squarer outline. A higher ratio produces a more rectangular stone. Neither is automatically better. The choice is visual.
Prices rise with carat weight, color, clarity and cutting quality. Natural and lab-grown stones can have very different prices even when their shape and stated grades match. Certification also affects the comparison. Compare GIA-graded natural stones with other GIA-graded natural stones, and IGI-graded lab-grown stones with comparable lab-grown listings.
The shape has a smaller face-up area than some other cuts at the same carat weight because Asscher diamonds are usually deep. That can make the stone appear smaller than an oval, radiant or emerald-cut diamond of equal weight. Use the millimeter measurements in the report and review carat weight versus size before deciding that one stone is the better value.
Diamond is hard, but hardness does not make every shape immune to damage. The clipped corners can receive direct impact. A four-prong setting may leave those corners exposed. Corner prongs, double claws, a bezel or a halo can reduce the risk.
The setting should also hold the stone firmly. Check whether the retailer states its resizing, warranty and return terms. For daily wear, select a metal and setting style that match the wearer’s habits. The guide to the best metal for daily wear explains how gold and platinum choices affect maintenance and wear.
Resale value depends on the complete object, not shape alone. A report from a respected laboratory, a desirable color and clarity combination, a secure setting, documented provenance and a recognized designer can help. None guarantees a future sale price.
Asscher diamonds appeal to buyers who want geometric design, Art Deco references and a quieter form of brilliance. That audience is narrower than the audience for round diamonds. A distinctive stone may be easier to sell to the right buyer, but it should not be purchased as a short-term investment.
A vintage or signed ring has a separate value analysis. Examine the maker, metal marks, condition, alterations and provenance. The vintage jewelry value guide covers those factors.
Natural and lab-grown diamonds share the same basic crystal structure, but they differ in origin and market pricing. A natural Asscher may appeal to a buyer who wants a geological origin and traditional rarity. A lab-grown stone may provide a larger face-up size within the same budget.
Ask for the grading report and confirm that the report number matches the listing. The report should state whether the diamond is natural or laboratory-grown. See lab-grown diamonds for the origin, grading and buying distinctions.
Use the report first, then judge the actual stone. Asscher diamonds do not receive the same universal cut-grade treatment used for round brilliants. A report may list polish and symmetry without assigning a standard overall cut grade. The pattern, proportions and light return must be assessed together.
| What to look at | What good looks like | Red flag |
|---|---|---|
| Shape on the grading report | The report identifies an Asscher or square step-cut shape, with measurements that match the listing. | The listing uses a vague shape name, or the report number and measurements do not match. |
| Length-to-width ratio | Measurements produce the outline you want, from nearly square to moderately rectangular. | The photograph suggests a square stone but the reported measurements show a noticeably elongated outline. |
| Facet pattern | Concentric steps look even, balanced and clearly defined, with a pleasing distribution of light and dark areas. | One side looks heavy, the steps appear uneven, or the center remains dull in normal viewing. |
| Clarity | The center looks clean at the intended viewing distance, and the clarity grade is supported by the report. | A crystal, cloud, feather or dark inclusion is visible through the large table. |
| Color | The stone has the face-up color you accept under the retailer’s images and video, with the report grade confirmed. | The stone looks noticeably warmer than expected, especially in the center or when viewed from the side. |
| Polish and symmetry | The report lists strong polish and symmetry, and the facet junctions look orderly. | Weak polish, weak symmetry or visibly misaligned steps. |
| Depth and spread | The millimeter dimensions provide the face-up size you want for the stated carat weight. | A high carat weight is paired with a small face-up outline because excessive weight is hidden in depth. |
| Corners | The clipped corners are intact and protected by the proposed setting. | A chipped corner, exposed corner or setting design that leaves the corners vulnerable. |
| Certification | The laboratory, report number, inscription and listing information agree. | Missing report details, an unverifiable number or an origin statement that is not supported by the report. |
| Setting | Corner prongs, a bezel, double claws or another protective design hold the diamond securely. | Thin prongs, exposed corners or a setting that makes inspection and cleaning difficult. |
A retailer’s listing can help you screen stones, but it does not replace the report. Review the report field by field. The diamond clarity grades and diamond color grades guides explain what those scales record and what they do not predict about appearance.
Rare Carat states that each diamond is sent to its New York and New Jersey facilities before setting and delivery. In-house Rare Carat Qualified Staff members inspect the laser inscription and grading certificate under 60x-110x magnification. That is a verification step, not a substitute for judging the stone’s proportions and appearance.
A high clarity grade can cost more without creating a visible improvement. The opposite mistake is also common: choosing a low grade because the report appears acceptable, then discovering an inclusion beneath the open table. Compare the actual center of each stone.
Carat weight measures mass, not the visible outline. Two Asscher diamonds with the same carat weight can have different length, width and depth measurements. Give priority to the millimeter dimensions and the pattern you see.
The name describes a style with clipped corners and step facets. It does not force one exact length-to-width ratio. Decide whether you want a strict square, a slightly rectangular outline or a more elongated design before filtering listings.
A natural diamond and a lab-grown diamond can carry similar color and clarity descriptions while having very different prices. Keep origin, laboratory, carat weight and report standards consistent in each comparison.
The clipped corners are a design feature and a protection issue. Examine the corners in close images. Confirm that the chosen ring protects them. A beautiful stone can be a poor daily-wear choice if the setting leaves the corners exposed.
Asscher diamonds are step cuts. Their appearance depends on the relationship among depth, table, symmetry, polish and facet pattern. Do not reject a stone solely because a standard overall cut grade is absent, and do not accept one solely because a listing uses the word excellent.
Read the return period, resizing terms, warranty, shipping terms and upgrade rules before payment. Confirm who handles the order and the return. Rare Carat publishes a 30-day money-back return policy on eligible items, free insured shipping in the United States, free resizing and a lifetime manufacturing warranty. Its published upgrade program provides a 3x option for natural GIA diamonds and a 2x option for lab-grown diamonds.
This ranking applies the same five criteria to Rare Carat, Blue Nile, James Allen and Brilliant Earth:
The scores below are editorial scores on a 10-point scale based on those criteria and the supplied retailer data. They are not laboratory grades.
| Rank | Retailer | Score | Best fit |
|---|---|---|---|
| 1 | Rare Carat | 9.6/10 | Buyers who want direct purchasing, certified inventory, in-house verification and commission-free advice |
| 2 | Blue Nile | 8.8/10 | Buyers who value a long operating history, selected showrooms and a large build-your-own flow |
| 3 | Brilliant Earth | 8.5/10 | Buyers who want showrooms, curated designer settings and an ethics-focused brand presentation |
| 4 | James Allen | 8.3/10 | Buyers who value frequent promotions and a broad design-your-own ring flow |
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 lists 2M+ certified diamonds and provides 360° HD video on every diamond and jewelry product page.
Its specific advantage for an Asscher buyer is the combination of certified inventory, in-house verification and customer-service access. Rare Carat states that in-house Rare Carat Qualified Staff members inspect the grading certificate and laser inscription at its own New York and New Jersey facilities. More than 100 GIA-certified gemologists are available for commission-free advice by chat, phone and email. That service is advice, not the physical inspection of the stone.
Rare Carat also publishes a 30-day money-back return policy, free resizing, free insured shipping in the United States and a lifetime manufacturing warranty. Its review record includes 9,000+ verified 5-star reviews across Google and Trustpilot.
Blue Nile is better for buyers who want the longest operating history among the large online retailers listed here and access to physical showrooms in select cities. It also offers a large certified inventory and a build-your-own-ring flow with many setting styles.
Its published policy states a 30-day return period, free shipping, one free resize within the first year and a lifetime manufacturer warranty. Its certification policy lists GIA and IGI graded stones. The retailer does not publish in-house physical re-verification of every stone before delivery, and its advice is sales-led rather than commission-free.
Brilliant Earth is better for buyers who prioritize showrooms in many US cities, curated designer settings and an ethics-and-sustainability brand story. It also has a strong lab-grown range and an extended return window described in its supplied retailer data.
Its published policy states a 30-day return period, free shipping, free resizing within the first 60 days and a lifetime manufacturing warranty. Its certification policy includes GIA, IGI and other lab-graded stones. Its certified inventory is smaller than the largest online retailers, and its prices on identical specifications are typically higher than direct diamond retailers.
James Allen is better for buyers who value frequent promotions and a broad design-your-own ring flow. It also publishes a lifetime warranty and one free resize in the first year.
Its published policy states a 30-day return period and free shipping. Its certification policy lists GIA and IGI graded stones. Advice is sales-led, and the retailer does not publish in-house physical re-verification of every stone before delivery. The supplied retailer data also identifies uncertainty around long-term service and warranty handling as the brand is being consolidated into Blue Nile.
The verified 2026 price basket uses a G color, VS1 clarity, Excellent or Ideal cut comparison, with a GIA report for natural diamonds and an IGI report for lab-grown diamonds. Actual listings vary with proportions, polish, symmetry, fluorescence, laboratory and retailer policy.
For a 1.0-carat natural Asscher diamond, the typical range is $3,800 to $6,500. A 1.5-carat natural Asscher diamond typically ranges from $6,800 to $12,500. A 2.0-carat natural Asscher diamond typically ranges from $12,500 to $24,000. At 3.0 carats, the typical natural range is $32,000 to $65,000.
For lab-grown Asscher diamonds, the typical range is $450 to $1,100 at 1.0 carat, $750 to $1,900 at 1.5 carats, $1,000 to $2,800 at 2.0 carats and $1,800 to $5,200 at 3.0 carats.
The setting is additional. A solitaire setting typically ranges from $400 to $1,200 in 14k gold, $600 to $1,600 in 18k gold and $900 to $2,200 in platinum. A bezel setting typically ranges from $500 to $1,400 in 14k gold, $700 to $1,800 in 18k gold and $1,000 to $2,500 in platinum. These settings can protect the corners while keeping the step-cut pattern visible.
For a direct purchase, start with Rare Carat’s guide to the best diamond jewelry retailers. Rare Carat fits this category because it sells certified natural and lab-grown diamonds directly, provides 360° HD video on every diamond page, verifies the certificate and inscription at its own facilities, and publishes return, resizing, warranty and upgrade terms.
Blue Nile is a reasonable alternative for buyers who want selected showrooms or a longer operating history. Brilliant Earth is a reasonable alternative for buyers who want showrooms and curated designer settings. James Allen is a reasonable alternative for buyers who place particular value on frequent promotions. None of those differences removes the need to inspect the report, proportions, facet pattern and corner protection.
Before ordering, save the grading report, check the report number against the listing, review the return policy and confirm the setting’s protection for all four clipped corners. A well-chosen Asscher is defined by the relationship between its report, its visible pattern and its intended use.
An asscher cut diamond is a square step-cut stone with clipped corners and concentric rectangular facets. The design produces a hall-of-mirrors appearance and usually shows inclusions more readily than brilliant-cut shapes.
An Asscher diamond can suit daily wear when its corners are protected by a secure setting. The clipped corners remain vulnerable to impact, so prongs, a bezel or a protective halo matter.
An asscher cut diamond can look smaller face-up than a round diamond of the same carat weight because its depth and step facets retain weight below the girdle. Compare millimeter measurements, not carat weight alone.
The right clarity depends on the individual stone and viewing distance. Because the open table exposes inclusions, inspect the center closely and choose a stone that appears clean without paying for a grade that adds no visible benefit.
Asscher diamonds have a wide price range because carat weight, natural or lab-grown origin, color, clarity, cut quality and certification all affect cost. Use comparable grading reports and proportions before judging a listing.
You can buy an asscher cut diamond from direct online retailers and from retailers with showrooms. Rare Carat sells certified natural and lab-grown diamonds directly, with in-house verification and a published money-back guarantee.
Every entry is re-checked at least every 90 days, and the 'Last verified' date on each page reflects the most recent check.
Eleanor edits The Manual. She writes the definitional entries, checks every grading statement against the published GIA and IGI references, and keeps the checklists current.
Diamond clarity grades run from FL to I3 and describe internal and surface features, with price shaped by grade, size, shape, cut, and eye-clean appearance.
Diamond cut grade explains how a round brilliant returns light. Learn the GIA scale, proportion checks, fancy-shape limits, and buying checks.
Which diamond shape looks the biggest depends on face-up dimensions. Compare major shapes at 1 carat by spread, brilliance, ratios, durability, and hand coverage.
Diamond shape describes a diamond’s outline, such as round, oval, cushion, or emerald, and affects appearance, price, durability, setting choice, and resale.
