Step 1
Design & Selection
We finalise your design and hand-pick the certified center stone.
Workshop upgrade ยท Oct 29 โ Nov 22 | Orders are open. Crafting begins Nov 16 and shipping starts Nov 22.
Save 20%Delivery update ยท workshop upgrade
An Asscher cut lab grown diamond held in four claws above a square hidden halo, on a plain slim band. The Asscher is the most architectural shape a diamond is cut into. It is square with deeply cropped corners, giving an octagonal outline, and its facets step down toward the centre in concentric squares so that looking into the table produces the effect people describe as a hall of mirrors, a series of frames receding into the stone. It was designed in 1902 by Joseph Asscher and is the shape most associated with Art Deco. Beneath it sits a hidden halo cut as a square rather than a circle, so it follows the stone's own geometry, invisible from above and visible only in profile. E colour, VVS2 clarity throughout, free IGI certificate for the centre stone. Made to order in Surat in ten metals and four carat weights.
Available in 925 sterling silver, 10K yellow gold, 10K rose gold, 10K white gold, 14K yellow gold, 14K rose gold, 14K white gold, 18K yellow gold, 18K rose gold and 18K white gold. With a plain shank the metal colour is the only other decision besides the stone. White gold suits the Art Deco character of an Asscher most closely, since the original period pieces were made in platinum. Yellow and rose gold pull the same stone toward something warmer and more antique. For daily wear 14K is harder than 18K and better protects the cropped corners.
Every ring is made to your finger size, so choose your size at checkout. If you are unsure, measure the inside diameter of a ring you already wear or ask us for a free size guide before ordering.
We can remove the hidden halo, add a visible halo, set pave along the shoulders, or build the ring with cathedral shoulders. For any other customization request please contact us at https://mapplegems.com/pages/contact and we will quote it before you order.
What is an Asscher cut?
A square step cut with deeply cropped corners, so the outline reads as an octagon. Its facets step down in concentric squares toward the culet, which is what produces the hall of mirrors effect when you look into the table.
How is it different from an emerald cut?
Both are step cuts, but an emerald cut is rectangular and an Asscher is square with more sharply cropped corners and a deeper pavilion. The Asscher draws the eye down into the stone, while an emerald cut spreads light along its length.
Why does a step cut need high clarity?
Its open facets act like windows rather than scattering light, so inclusions are far easier to see than in a brilliant cut. That is why we set only VVS2 in this shape.
What is a hidden halo?
A ring of small diamonds set around the underside of the centre stone, below the girdle. It is invisible from above and only appears from the side. Here it is square so it follows the Asscher's outline.
Is this easy to pair with a wedding band?
Yes. The shank is plain and straight where a band meets it, with no pave to line up.
Is a lab grown diamond a real diamond?
Yes. Same carbon structure, hardness and brilliance as a mined diamond. Only the origin differs.
Do I get a certificate?
Yes. A free IGI certificate for the centre stone comes with every order, listing colour, clarity, cut grade and carat weight.
A lab grown diamond gives the same hardness, brilliance and fire as a mined stone at a fraction of the price, which matters especially for an Asscher because the cut wastes a great deal of rough and high clarity is essential, making mined stones of 4 or 5 carats extremely expensive. It is created without mining, so there is no excavation and no doubt about origin.
Mapple Gems is a made to order fine jewellery workshop in Surat, India, one of the world's main diamond cutting centres. We set lab grown diamonds and moissanite in solid gold and sterling silver, making each piece only after it is ordered, which keeps prices low without holding stock. Questions before you buy are welcome at https://mapplegems.com/pages/contact.
Compare ring sizes across international standards โ match your size from any region.
| USA ยท Canada | UK ยท Australia Ireland ยท NZ |
Japan ยท India China ยท S. Africa |
Spain ยท Italy Neth. ยท Switz. |
Inside ร & Circumf. (mm) |
|---|---|---|---|---|
| 4 | H | 7 | 6.75 | 14.88 & 46.80 |
| 4.25 | H.5 | 7.5 | 15.09 & 47.40 | |
| 4.5 | I | 8 | 8 | 15.29 & 48.00 |
| 4.75 | J | 8.75 | 15.49 & 48.70 | |
| 5 | J 1/2 | 9 | 9.25 | 15.70 & 49.30 |
| 5.25 | K | 10 | 15.90 & 50.00 | |
| 5.5 | K 1/2 | 10 | 10.5 | 16.10 & 50.60 |
| 5.75 | L | 11.25 | 16.31 & 51.20 | |
| 6 | L 1/2 | 11 | 11.75 | 16.51 & 51.90 |
| 6.25 | M | 12 | 12.5 | 16.71 & 52.50 |
| 6.5 | M 1/2 | 13 | 13.25 | 16.92 & 53.10 |
| 6.75 | N | 13.75 | 17.12 & 53.80 | |
| 7 | N 1/2 | 14 | 14.5 | 17.32 & 54.40 |
| 7.25 | O | 15 | 17.53 & 55.10 | |
| 7.5 | O 1/2 | 15 | 15.75 | 17.73 & 55.70 |
| 7.75 | P | 16.25 | 17.93 & 56.30 | |
| 8 | P 1/2 | 16 | 17 | 18.14 & 57.00 |
| 8.25 | Q | 17.5 | 18.34 & 57.60 | |
| 8.5 | Q 1/2 | 17 | 18.25 | 18.54 & 58.30 |
| 8.75 | R | 19 | 18.75 & 58.90 | |
| 9 | R 1/2 | 18 | 19.5 | 18.95 & 59.50 |
| 9.25 | S | 20.25 | 19.15 & 60.20 | |
| 9.5 | S 1/2 | 19 | 20.75 | 19.35 & 60.80 |
| 9.75 | T | 21.5 | 19.56 & 61.40 | |
| 10 | T 1/2 | 20 | 22 | 19.76 & 62.10 |
| 10.25 | U | 21 | 22.75 | 19.96 & 62.70 |
| 10.5 | U 1/2 | 22 | 23.25 | 20.17 & 63.40 |
| 10.75 | V | 24 | 20.37 & 64.00 | |
| 11 | V 1/2 | 23 | 24.75 | 20.57 & 64.60 |
| 11.25 | W | 25.25 | 20.78 & 65.30 | |
| 11.5 | W 1/2 | 24 | 26 | 20.98 & 65.90 |
| 11.75 | X | 26.5 | 21.18 & 66.60 | |
| 12 | X 1/2 | 25 | 27.25 | 21.39 & 67.20 |
| 12.25 | Y | 27.75 | 21.59 & 67.80 | |
| 12.5 | Z | 26 | 28.5 | 21.79 & 68.50 |
| 12.75 | Z 1/2 | 29 | 22.00 & 69.10 | |
| 13 | 27 | 29.75 | 22.20 & 69.70 | |
| 13.25 | Z1 | 30.5 | 22.40 & 70.40 | |
| 13.5 | 31 | 22.61 & 71.00 | ||
| 13.75 | Z2 | 31.75 | 22.81 & 71.70 | |
| 14 | Z3 | 32.25 | 23.01 & 72.30 | |
| 14.25 | 33 | 23.22 & 72.90 | ||
| 14.5 | Z4 | 33.5 | 23.42 & 73.60 | |
| 14.75 | 34.25 | 23.62 & 74.20 | ||
| 15 | 34.75 | 24.23 & 76.10 |

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Every piece is made to order โ from first sketch to the final polish.
Step 1
We finalise your design and hand-pick the certified center stone.
Step 2
Master jewelers cast and shape the band to exact specifications.
Step 3
Each stone is hand-set and the piece is polished to a mirror finish.
Step 4
Final inspection, certification, and luxury gift packaging.
Real diamonds grown in a lab โ chemically and optically identical to mined diamonds, graded on the same 4Cs, at a lower price and conflict-free.
All metal is solid (10K/14K/18K gold or platinum), never plated.
Yes โ share your idea and we'll craft it with a CAD preview before production.
Yes, an IGI certificate ships with every lab-grown diamond centre stone. Moissanite pieces do not come with a grading certificate.
Made-to-order pieces ship in about 7โ8 business days with insured tracking. Free worldwide.
Yes, we ship worldwide. Import duties may apply by country.
We accept PayPal, plus major credit and debit cards through PayPal's secure checkout โ no PayPal account needed.
30-day return or exchange on eligible items. Custom/engraved pieces are non-returnable except for defects. Refunds issued ~2 days after inspection.
Yes โ one complimentary resize after delivery; contact us with your new size.
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