Asscher Natural Diamonds

What defines an Asscher cut natural diamond?

An Asscher cut natural diamond is a square step cut with deeply cropped corners, a high crown, and a small table — characteristics that draw the eye into a series of concentric squares rather than outward in a burst of light. The cut was first developed by the Asscher Diamond Company in Amsterdam in 1902, and the modern royal Asscher variant, refined in the early 2000s, adds additional facets to improve light return. Because Asscher natural diamonds form over billions of years beneath the earth's crust, each stone carries minute inclusions and growth patterns unique to that crystal. The step-cut faceting makes those internal characteristics more visible than they would be in a brilliant cut, so clarity plays a more prominent role in stone selection here than it might elsewhere. Natural Asscher diamonds with VS2 or above clarity tend to present the cleanest face-up appearance, though an experienced eye can find well-priced VS2 and even SI1 stones where inclusions sit near the girdle and away from the table.

How to choose a natural Asscher diamond — shape ratio, clarity, and colour

Selecting a natural Asscher diamond involves balancing four considerations specific to the step-cut format. First, length-to-width ratio: a true square Asscher sits between 1.00 and 1.05; anything above 1.08 drifts toward a rectangular emerald cut profile. Second, clarity grade: the open, parallel facets of the Asscher cut act like windows — inclusions placed centrally are plainly visible to the naked eye, so VS2 or higher is generally advisable for a stone above 0.75ct. Third, colour: the step-cut geometry retains body colour more noticeably than a round brilliant, meaning natural Asscher diamonds in the G–H range strike a practical balance between whiteness and value. D–F stones offer a finer face-up result if colour purity is the priority. Fourth, cut quality: well-executed Asscher natural diamonds show a crisp, symmetrical X pattern at the centre when viewed face-up — misaligned facets break this pattern and reduce the characteristic depth illusion. All Asscher natural diamonds offered here are certified by GIA, HRD or IGI, with cut, colour, clarity, and carat weight independently verified.

What does a natural Asscher diamond cost in the UK?

Natural Asscher diamonds typically command a modest premium over round brilliants of equivalent carat weight at lower grades, but can trade at a discount to rounds at the top of the colour and clarity scale, where demand for round certificates is most intense. The step-cut format means less rough diamond is lost in polishing than with some fancy shapes, which partly offsets rarity. Carat weight, clarity grade, colour grade, and fluorescence all move the price meaningfully. Bridebook's 2026 UK average engagement ring spend of £2,247 provides a useful reference point for ring budgets, but loose Asscher natural diamonds are also purchased for dress rings, anniversary pieces, and other settings beyond the engagement context — the stone itself is priced independently of any mounting. Complimentary insured UK delivery is included on every order, and a 30-day no-questions return window applies to all loose stone purchases with no exclusions.

How does a natural Asscher diamond compare with a lab-grown Asscher?

Natural Asscher diamonds and lab-grown Asscher diamonds share identical optical, chemical, and physical properties — both are pure crystallised carbon, both are certified to the same GIA, HRD or IGI standards, and both exhibit the same hall-of-mirrors facet pattern. The distinction lies in origin and long-term value behaviour. A natural Asscher diamond formed underground over geological time and is finite in supply; historically mined diamonds have retained or appreciated in secondary-market value over multi-decade periods, though no future return is guaranteed. A lab-grown Asscher diamond produced by a specialised grower offers a larger, higher-clarity stone at a significantly lower price point for the same budget. Neither option is inherently superior — the choice depends on whether the geological provenance and historical value trajectory of a natural stone matters more than maximising per-carat specification within a given spend.

Setting a natural Asscher diamond into a ring — what to expect

When a loose natural Asscher diamond is selected for setting, our Hatton Garden workshop takes over. The process moves from consultation through CAD design to a silver or wax sample that can be reviewed at the workshop before casting begins — an important step for a square step-cut stone, because the four-claw or eight-claw settings commonly paired with Asscher natural diamonds benefit from precise positioning to protect the cropped corners. Once approved, the ring is cast, set, finished, polished, and hallmarked at the London Assay Office. Lead time from order confirmation is 7 to 14 working days, depending on design complexity. The ring carries a lifetime warranty and free resizing for life. Returns on the loose stone remain available within 30 days of purchase; once set into a bespoke ring, the ring's own return policy applies.