• Gyuto 230mm GoMai Stainless Clad Integral I-Beam Frame Handle Mamoth Ivory
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Gyuto 230mm GoMai Stainless Clad Integral I-Beam Frame Handle Mammoth Ivory

Gyuto 230mm GoMai Stainless Clad Integral I-Beam Frame Handle Mammoth Ivory

By Antoine Kniamen

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Antoine Kniamen

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This handmade kitchen knife is a true one-of-a-kind creation from the renowned French blacksmith Antoine Kniamen. A stunning fusion of Western and Japanese design, the knife's hybrid profile offers unparalleled versatility for both professional chefs and home cooks alike. The edge profile borrows from the Japanese Gyuto, but with a slightly more bellied curve, allowing for fluid rocking motions while still supporting precise chopping techniques. Taller than a traditional Gyuto, the additional height offers greater knuckle clearance and a more commanding presence on the cutting board. This dynamic blend of design elements results in a knife that feels equally at home slicing through delicate herbs or breaking down larger cuts of meat with ease. Whether on display in a fine dining restaurant or as a centerpiece of a home kitchen collection, this knife’s utility and elegance are unmistakable.

The knife's geometry is a masterclass in precision craftsmanship. It features a highly tapered spine that provides exceptional balance, making it feel nimble and responsive in the hand. This thoughtful design gives the user incredible control during use, offering the precision required for delicate tasks and the heft necessary for more demanding cuts. The finely shaped convex bevels further enhance its cutting performance by reducing friction as the blade moves through ingredients, ensuring smooth, effortless slicing. Food release is excellent, minimizing sticking and improving efficiency during prep work. The heart of the blade is forged from a composite steel, with a core of Apex Ultra—a high-carbon steel renowned for its edge retention—encased in layers of stainless steel and nickel. This construction not only provides superior cutting power but also ensures rust resistance and structural integrity. The black-etched finish, contrasted against the bright silver layers of nickel and stainless steel, creates a visually striking and highly functional work of art.

The handle is an equally impressive blend of artistry and engineering. Antoine’s signature "I-Beam" design features an intricately TIG-welded and polished integral bolster, offering a seamless transition from blade to handle. The scales are crafted from a rare and highly sought-after set of mammoth ivory with mesmerizing blue streaks. These natural blue hues are a result of millennia-long mineralization, where iron and other minerals permeate the fossilized ivory, leaving behind vibrant and unique coloration. Each handle is, therefore, a singular masterpiece of natural art. To complement this visual splendor, the handle also incorporates blackened steel accents that provide a matte texture for a secure, slip-resistant grip. The matte finish resists fingerprints, maintaining its sleek, clean appearance even with frequent use. Together, these elements showcase Antoine Kniamen’s masterful approach to functional design and artistic expression. This knife’s beauty, balance, and performance make it a remarkable achievement—a shining example of Kniamen’s craftsmanship and a glimpse of more exciting creations to come.

Product Specification
  • Blade Type:
  • Overall Length: 365mm
  • Edge Length: 230mm
  • Spine Heel: 3.55mm
  • Spine Mid: 1.91mm
  • Spine Tip (20mm before): 0.84mm
  • Blade Height: 59.5mm
  • Weight: 296g
  • Cutting Edge Steel:
  • Steel class: Carbon
  • HRC: 66
  • Blade Construction:
  • Blade Finish: Satin Polish, Acid Etched (Forced Patina)
  • Grind:
  • Handle Construction:
  • Handle Materials: Mammoth Ivory
  • Handedness: Ambidextrous

Blade type

Gyuto

牛刀

The Japanese take on the Western chef's knife, and the most versatile blade in a modern kitchen. A gyuto carries a long, gently curved edge — most often 210 to 270 mm — that allows both push cuts and a rocking motion, with a pointed tip for fine work and enough height at the heel to keep knuckles clear of the board. It handles proteins, vegetables, and herbs without complaint, which is why most cooks reach for it first.

Compared with a European chef's knife, the gyuto is usually thinner, harder, and lighter, ground to a finer edge that rewards good board technique and regular honing. That same thinness is the trade-off: the edge is less forgiving of bone, frozen food, and twisting cuts, and it asks for a little more care in maintenance in exchange for its keenness.

View full knife type guide →

Cutting edge steel

Apex Ultra

Low-alloy fine-grain carbon tool steel

Typical HRC
64–68
Corrosion class
Carbon
Production
Conventional
Origin
Austria (ApexUltra project — developed by Larrin Thomas, Marco Guldimann and Tobias Hangler; FFG-funded, associated with Messerschmiede Hangler)

Apex Ultra is one of the most carefully engineered non-stainless kitchen knife steels in modern circulation — a steel designed from the ground up specifically for handmade knives, rather than borrowed from another industry. It was developed by metallurgist Larrin Thomas together with smiths Marco Guldimann and Tobias Hangler. It is a low-alloy carbon steel — roughly 1.25 percent carbon, 2.6 percent tungsten, 1.5 percent chromium and a 0.4 percent vanadium addition, with manganese and silicon kept low. That composition is tuned for high purity and a fine, evenly distributed mix of chromium-enriched iron carbides, tungsten carbides and vanadium carbides — the structure that lets it hold a very hard edge without the coarse carbides or plate martensite that sap toughness in other high-hardness carbon steels.

What this means for a cook is unusual permission. Apex Ultra carries very high toughness in the 66+ HRC range — the highest of any knife steel its developers have tested at that hardness — so you can ask a maker to grind it thin and run the heat treatment hard, and the edge will hold far longer than the carbon steels smiths usually forge, without microchipping. It forges and forge-welds much like 52100 or 1.2562, sharpens cleanly on natural and synthetic stones without needing diamond plates, and its modest chromium slows patina a little — though it is not stainless and should be cared for as a carbon steel.

Apex Ultra has become a signature steel of the European maker community, and the Modern Cooking catalogue carries an unusually deep bench of smiths working in it. Tobias Hangler himself heads that group, alongside Marco Guldimann, Benjamin Kamon, Martin Huber, Jonas Johnsson, Karol Karyś, Birch & Bevel, and MCx. It is genuinely a step forward — one of the relatively few cases where the marketing claims and the underlying metallurgical data are saying the same thing.

View full steel guide →

Blade construction

Laminated Steel

A category covering knives built from multiple layers of different steels forge-welded together. The hard cutting steel is sandwiched between softer outer layers (cladding) that protect the core, add toughness, and often contribute visual contrast.

The most common laminated constructions in the Modern Cooking catalogue are:

SanMai (三枚) — three layers: hard cutting steel in the centre, softer cladding on both sides. The traditional and most common form.

GoMai (五枚) — five layers: a hard core, two intermediate layers, and two outer layers. Adds visual depth and structural complexity.

KuMai (九枚) — nine layers: similar logic, with more cladding layers for additional pattern and structural variation.

GoMai and KuMai are often chosen not only for the additional layers and visual depth, but also because the intermediate layers can act as a nickel diffusion barrier — limiting carbon migration out of the core into the cladding during forge welding, and protecting the core's intended carbon content through the heat of the forging process.

In all cases the cutting performance is determined by the core steel; the outer layers are cosmetic and structural. The lamination contributes corrosion protection (when a stainless jacket clads a carbon core), reduced reactivity, and the visible boundary between core and cladding that gives the knife its character.

View full construction guide →

Grind

Convex

A grind whose bevel bulges outward in a gentle curve from spine to edge, rather than running flat. That extra steel directly behind the edge makes a convex grind notably strong and resistant to chipping, while the curved geometry helps food release and lets the blade glide through dense ingredients with less wedging than a flat grind.

The strength comes at the cost of ultimate thinness and ease of maintenance. A convex edge has more metal behind it, so it is not quite as effortlessly keen as a thinly flat-ground edge, and it is harder to sharpen freehand — holding the curve takes a stropping technique or a deliberate hand rather than a single fixed angle. The reward is an exceptionally tough, smooth-cutting edge.

View full grind guide →

Handle construction

Integral

A construction in which the bolster — and, in a full integral, a frame around the handle as well — is formed from the same single piece of steel as the blade rather than added as a separate part. The bolster and blade are continuous metal, forged or machined from one billet so there is no seam between them, with the tang carrying the handle material behind the integral section.

The design announces itself at the transition from blade to handle: a seamless steel bolster, and on a frame integral a steel surround bordering the handle material on every side. That unbroken metal gives a distinctive, resolved look and a forward, substantial feel, and removes the joint where a fitted bolster would otherwise meet the blade. It is a hallmark of high-end Western knifemaking and a demanding piece of forging or machining to execute cleanly.

View full construction guide →

Shipping & Returns

Shipping

We process orders 5 days a week (Monday - Friday) and ship from our shop in Sydney, Australia. We ship with FedEx, UPS and DHL.

We are happy to offer free international shipping on a variety of orders depending on location and order value.

Free Shipping Regions and Minimum Order Values

For Australia and New Zealand the minimum is $500AUD. For the rest of the world it is approximately €1000EUR. The discount is applied automatically when you reach the minimum cart value at checkout.

Returns

If you're not entirely happy with your purchase, you can return it within 14 days of delivery for a refund. The item must be in its original condition with all original packaging.

  • Returns are accepted for 14 days
  • The customer is responsible for return shipping costs
  • A 15% restocking fee may be applied to change-of-mind returns
  • We do not accept returns on second-hand items for change of mind

Faulty or Damaged Items

You must notify us within 5 business days of receiving your order. Photographic evidence of damage is required. Once approved, Modern Cooking will cover return shipping costs.

Product Care

Cleaning: Clean by hand with warm water. Avoid wetting the handle when possible.

Sharpening: We advise using whetstones to sharpen your knives and a honing rod or steel to maintain the burr between sharpening sessions.

Reactive Steels: Reactive steels like Aogami Super, Apex Ultra or premium reactive German and Swedish steels are susceptible to rust if not properly cared for. Keep the knife dry between uses and when storing for longer periods, wiping the blade with Tsubaki oil or another food-safe oil is a wise choice. A patina can be a beautiful personal feature on your knife and helps to stop rust forming.

Handle Care: For non-stabilised wooden handles, apply Tsubaki oil or another food-safe oil from time to time. Food-safe wax can be applied to both stabilised and non-stabilised wooden handles. Never apply hot wax or oil as you risk warping or damaging the handle.

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