NEMESIS | Black Tungsten CZ Eternity Wedding Ring — 8mm

The NEMESIS is a handcrafted black tungsten carbide men's wedding band, 8mm wide, with a channel of brilliant-cut CZ stones set edge-to-edge around the band and polished beveled edges. Built comfort-fit, inside-laser-engravable, and backed by our lifetime warranty — a ring built to outlast the job site, the gym, and everything else you put it through.

The Metal

Tungsten carbide is the hardest wedding-band metal made — roughly 4× harder than titanium and 10× harder than 18k gold. That's not marketing language; it's a measurable Mohs hardness of 8.5–9. In practical terms: the NEMESIS will not scratch from keys, tools, gym equipment, or daily contact with desks, steering wheels, or phone cases. It will look the same in five years as it looks the day you open the box.

The black tone isn't paint or coating. It's a physical-vapor-deposited (PVD) black finish bonded to the tungsten at the molecular level — the same process used on high-end watch bezels. It won't peel, strip, or wear through. The metal is also fully hypoallergenic and nickel-free, which matters if your skin reacts to other rings.

The CZ Eternity Band

The brilliant stones around the NEMESIS are channel-set cubic zirconia — a diamond simulant, not a natural diamond. We call that out clearly because a lot of bands in this category are marketed as "diamond" when they're really CZ; we want you to know exactly what you're buying. The optical quality is excellent: Mohs hardness 8.5, brilliant round cut, full fire and scintillation under light. Each stone is channel-set flush with the band surface so nothing catches on clothing or gloves.

The contrast of bright CZ against the black PVD is what sells this ring — white stones read sharper on black than they do on silver or gold, and the beveled edges frame the stone channel cleanly.

Who It's For

The NEMESIS is for the man who wants the look of a diamond eternity band in a dark, stealth palette — stones that catch light against a ring that doesn't. It pairs with a black watch, dark suits, or a modern minimalist wardrobe. If you want something bright or gold, see the LEGEND. If you want plain black, see our solid black tungsten bands. The NEMESIS is for the buyer who wants both at once.

Key Features

• Tungsten carbide construction — 4× harder than titanium, 10× harder than 18k gold, scratch-resistant for daily wear
• Hypoallergenic — nickel-free, safe for sensitive skin
• Black PVD finish — molecularly bonded to the tungsten core, will not peel or strip
• Channel-set CZ eternity band — brilliant-cut diamond simulants (not natural diamonds), flush-set around the band
• 8mm width with polished beveled edges
• Comfort-fit interior — rounded inside for all-day wear
• Free inside laser engraving — up to 30 characters, any font
• Lifetime warranty + replacement sizing program — defect coverage and a replacement ring if your finger size changes (see warranty page)
• Ring sizes 7 – 15 (including half sizes)

Care Instructions

Tungsten carbide is nearly maintenance-free. Clean the NEMESIS with warm water, a drop of mild dish soap, and a soft toothbrush to reach behind the stone channel and lift out skin oils. Dry thoroughly. The black PVD won't tarnish, oxidize, or react to normal daily contact — soap, shampoo, sweat, and sunscreen won't affect it. Avoid hammer blows or heavy impact: tungsten is extremely hard but can crack under direct shock, and any set stone can chip under a hammer blow. Remove the ring for direct-impact work as a precaution.

Closing / CTA

A wedding band should outlast the marriage it represents. The NEMESIS is built that way — black tungsten, CZ eternity, and a lifetime of service behind it. Select your size above, add your engraving, and we'll handcraft your NEMESIS and ship it insured within 1–2 weeks.

Engrave the inside. Make it his.

Frequently Asked Questions

Q: Are the stones in the NEMESIS real diamonds? A: No — and we want you to know that clearly. The NEMESIS uses channel-set cubic zirconia (CZ), a diamond simulant. It's optically excellent (Mohs 8.5 hardness, brilliant round cut) and flush-set into the band, but it is not natural diamond. If you want real diamond on a tungsten band, see the VALOR or ROYCE.

Q: Will tungsten scratch from daily wear? A: No. Tungsten carbide is rated 8.5–9 on the Mohs hardness scale — roughly 4× harder than titanium and 10× harder than 18k gold. Keys, tools, gym weights, steering wheels, and daily contact will not scratch the surface. After ten years of wear, it will look the same as the day you unboxed it.

Q: Can I engrave the NEMESIS? A: Yes. Free inside engraving is included — up to 30 characters, any font. Tungsten requires laser engraving because the metal is too hard for a traditional rotary bit, which is why the engraving stays crisp and permanent. Engraving is inside-only on the NEMESIS because the outside of the band is set with stones.

Q: Will the black finish wear off? A: No. The black color on the NEMESIS is a PVD (physical vapor deposition) finish — bonded to the tungsten at the molecular level, not a paint or coating. It's the same black-finish process used on high-end watch bezels, and it won't peel, strip, or wear through under normal daily wear.

Q: Can the NEMESIS be resized? A: No — tungsten is too hard to bend or stretch. Instead, we include a replacement sizing program: if your finger size changes within the lifetime of the ring, send the ring back and we'll replace it with the new size for a small handling fee. The ring itself will never deform on your finger.

Q: How do I care for the NEMESIS? A: Clean with warm water, mild dish soap, and a soft toothbrush to reach behind the stone channel. The black PVD won't tarnish or react to soap, shampoo, sweat, or sunscreen. Avoid direct hammer blows — tungsten can crack under sudden shock and any set stone can chip under impact.

Every ring you purchase from us includes a lifetime warranty and lifetime resizing. We make our jewelry with great care, using top-quality materials and skilled craftsmanship. We guarantee that our products are free from defects. If, by any chance, a piece of jewelry doesn't meet our high standards, we will replace it under our warranty. For more details, visit our 'Lifetime Warranty and Sizing' page.

USA, CANADA, AUSTRALIA, UK SHIPPING

• We offer FREE Shipping on every order placed on our site anywhere in the United States, Canada, Australia, and the UK. 
• No Minimum is required for FREE Shipping to the US. 
• A minimum of $90 USD is required for Free Shipping to Canada, Australia, and the UK.  
• Next-day and Express delivery options are also available. (Processing Time Is Still Needed)
• Items ship within 1-5 business days.
• In-store collection is available within 1 to 5 business days.

INTERNATIONAL SHIPPING

• We ship worldwide to most countries around the world. If your country is not listed at checkout, please contact us, and we will be able to help.
• Delivery times may vary depending on the country.
• UPS/FedEx Express options are available for faster delivery.

RETURNS AND EXCHANGES

• Visit Returns & Exchanges for full details.

Elevate Your Love Story with Tungsten Carbide Wedding Bands

• Unmatched Durability: Tungsten Carbide is celebrated for its extraordinary hardness, surpassing even gold by approximately 10 times, ensuring your wedding band remains exceptionally resistant to scratches and wear.

• Everlasting Shine: Tungsten Carbide possesses a "permanent shine" that endures, reflecting your eternal commitment.

• Sturdy and Substantial: Tungsten Carbide is a substantial metal, offering a reassuring weight and solid feel on your finger, symbolizing the weight of your love and commitment. Plus, it's cobalt-free for hypoallergenic assurance.

• Timeless Beauty: Unlike softer metals, Tungsten Carbide rings maintain their ageless allure, representing a love story built to last.

At Aydins Jewelry, we craft enduring love stories with Tungsten Carbide wedding bands that embody the strength, beauty, and purity of your commitment. Explore our exquisite Tungsten Carbide collection today and elevate your love story to new heights.