The SIGMA is a handcrafted black tungsten carbide men's wedding band, 8mm wide, with a polished black exterior and a bright white ceramic interior sleeve visible on the inside of the band. Built comfort-fit, laser-engravable, and backed by our lifetime warranty - a black-and-white two-material wedding band where glossy tungsten meets clean technical ceramic.

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: this band 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 is a PVD (physical vapor deposition) finish bonded to the tungsten core at the molecular level - not paint or plating. It won't peel, strip, or wear through. The metal is fully hypoallergenic and nickel-free. The beveled profile chamfers the outer edges for a clean silhouette. The interior is a separate bright white ceramic sleeve fitted flush inside the tungsten exterior - a hard, inert, skin-friendly material that sits against the finger.

The Black Tungsten Exterior with White Ceramic Interior

The SIGMA is a two-material ring with a clean visual break from outside to inside. The exterior is fully polished black tungsten - mirror-reflective across the crown and smoothly chamfered at the beveled edges. The moment the ring tips toward you, a bright white ceramic interior surface comes into view, framed perfectly by the black outer rim.

Ceramic interiors are a technical choice: ceramic is exceptionally hard, inert, and smooth, which means the sleeve resists scratching from daily wear and sits comfortably against skin. From the outside the ring reads as a pure black band with a crisp white flash on every turn of the finger. It's a minimalist two-tone wedding band built from two different high-performance materials rather than two PVD colors.

Who It's For

The SIGMA is for the man who likes clean contrast and technical materials - black outside, white inside, no inlays, no stones, just a deliberate two-material construction. If you wear monochrome palettes, appreciate modern tech aesthetics, or simply want a wedding band that reads quietly sophisticated rather than decorative, this is the band.

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
• Polished black tungsten exterior with bright white ceramic interior sleeve - two-material wedding band with a clean black-and-white break
• 8mm width with smooth beveled profile
• 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)