Read more The most Scratch Resistant Metal 10X Harder than 18K Gold One of the hardest materials used in jewelry. Patented Formula TC.850 - Strong. - Durable. - Tarnish Resistant. Choose from a variety of Colors White, Black, Classic Gray, Yellow, and Rose. Read more What Makes Triton's Tungsten Triton’s Tungsten Carbide TC.850 actually stands for a patented formula consisting essentially of 85% Tungsten Carbide yielding a strong, heavy weight, and tarnish resistant material. This uniquely forged metal is perfect for a man’s active lifestyle (US Patent No. 8,061,033). Triton’s TC.850 uses exclusive patented nano-technology coatings that are applied to the surface of the metal using a physical vapor deposition (PVD) method that results in high scratch-resistance, high wear-resistance and increased hardness and durability. Are Triton Rings Warranteed? Yes. As with all Triton rings, our Tungsten Carbide rings are covered by the Forever Fit Limited Warranty, which covers imperfections in design, materials and/or workmanship. See a Triton retailer or the Triton Warranty for specific details. Can Triton Rings be Engraved? Laser engraving can be applied to any color – white, classic gray, black, yellow or rose – in the Triton TC.850 Tungsten Carbide collection. Forever Fit Warranty All Triton rings are warrantied against imperfection in design, materials or workmanship and are also covered by our Forever Fit warranty, which includes a lifetime ring size exchange. If your ring finger size ever changes, Triton will resize or replace your ring for as long as you own it for a shipping and handling fee. Certain metals, such as Tungsten Carbide, will be size exchanged as they cannot be resized due to their extreme hardness. To request a resize or size exchange, your Triton ring and proof of purchase must be taken to an authorized Triton jeweler in order for this warranty to be valid. You can find a local authorized Triton jeweler at the website. Any party other than Triton has worked on your Triton ring, the warranty is null and void. Warranty does not cover normal wear. Triton may substitute a similar style for discontinued styles. Triton is not responsible for sentimental value of the original jewelry. Read more