Asscher Lab Grown Diamonds

What is an Asscher cut lab grown diamond?

An Asscher cut lab grown diamond is a square step-cut stone with deeply cropped corners, a high crown, and a small table — producing a concentric, hall-of-mirrors optical effect rather than the scattered brilliance of a round cut. Developed in 1902 by the Asscher brothers, the cut was revived in the early 2000s and is now produced consistently in lab-grown form. The step facets run parallel to the girdle in three to four tiers, creating long flashes of light rather than sparkle. Lab grown Asscher diamonds are grown using CVD or HPHT processes and are chemically identical to mined stones — the cut's geometry is reproduced with the same precision.

How does a lab grown origin affect the Asscher cut?

Because the Asscher cut's step facets act like windows into the stone, clarity is more visible here than in brilliant cuts — meaning the origin of the diamond is not relevant, but the quality of the growth environment is. Lab grown Asscher diamonds are produced under controlled conditions that allow growers to minimise internal strain and inclusions, making it easier to achieve VS2 or higher clarity grades at a lower per-carat cost than equivalent mined stones. This matters specifically for an Asscher cut because inclusions positioned near the centre of a step-cut stone are far more apparent than they would be in a round brilliant of the same grade. Every Asscher lab grown diamond here is certified by GIA, HRD, or IGI with a full grading report covering cut, colour, clarity, and carat weight.

What to look for when choosing an Asscher lab grown diamond

Asscher lab grown diamonds reward attention to clarity and colour more than most other shapes. For the step-cut faceting to produce its characteristic optical depth, prioritise clarity of VS2 or above — SI1 inclusions that might be eye-clean in a round can sit prominently in an Asscher's open table. On colour, the large parallel facets can concentrate body colour slightly, so H or above is a sensible target for a white-looking stone in most metal settings. Length-to-width ratio for an Asscher typically sits between 1.00 and 1.05 for a square outline; anything beyond 1.08 reads as a rectangular emerald cut. Each certified grading report confirms the exact measurements.

What does an Asscher lab grown diamond cost in the UK?

Asscher lab grown diamonds are priced meaningfully lower per carat than their natural equivalents, reflecting lower extraction costs and consistent supply from controlled production. The exact price depends on carat weight, clarity, and colour grade — a 1.0ct Asscher lab grown diamond at VS2/G will differ from a 1.5ct equivalent at the same grades. For context, Bridebook's 2026 UK average engagement ring spend of £2,247 represents a useful benchmark; a lab grown Asscher at that budget typically reaches a larger carat weight or higher clarity grade than a comparable natural stone. Stones are available loose or set into a ring, with the ring process carrying its own cost depending on the chosen setting and metal.

Setting an Asscher lab grown diamond into a ring

When a loose Asscher lab grown diamond is selected for setting, our Hatton Garden workshop handles the full ring process: CAD design, a silver or wax sample for try-on by appointment, casting, setting, polishing, and hallmarking at the London Assay Office. Lead time is 7–14 working days from order confirmation. The Asscher cut's cropped corners suit four-claw or eight-claw settings that protect those points; bezel settings also work well and complement the cut's geometric outline. A solitaire setting keeps the architectural quality of the step-cut faceting unobstructed, while a channel-set or pavé band adds contrast without competing with the centre stone's distinctive interior pattern.