Binomial Ring

Sodalite & Silver

More than 1,000,000 happy customers worldwide

Find your size

Ring size

Find your size


  • Free express shipping worldwide Info Popup Our customers enjoy free express delivery without any import duties or taxes! Learn more>
  • 24 months warranty Info Popup If you find a defect in your model, please contact our customer support and we’ll find the best solution for you. Learn more>
  • 24-day refund policy Info Popup You are free to return your model within the 24-day period. Learn more>

A binomial is simply the sum or the difference between two parts, for example a+b or a-b. The binomial formulas (a+b)2 and (a-b)2 are derived from this.

Our “Binomial” signet ring is crafted from high-quality 316L stainless steel in silver and the rare and fascinating mineral sodalite. With sodalite, did you know that both fluorescence and phosphorescence is possible under UV light? Discover your new daily companion and wear your own personal piece of raw nature by your side!

EAN: # binomialring1


Width: 12mm

Ring size: Available in a range of sizes (see size chart)

Material: 316L stainless steel in silver and genuine blue sodalite gemstone



Core Features

Waterproof Design

You want to wear your unique piece 24/7 and never take it off again?
Then our products with a waterproof design are just the right fit for you!
Stone, pearls or stainless steel - these materials not only look good, but are also 100% water-resistant. Wear your piece of nature confidently, even while showering or during your next beach vacation!

Natural Look and Feel

Natural Look and Feel

Thanks to our special constructions made from natural materials, your Holzkern model means you’re wearing a genuine piece of nature.
Enjoy the distinctive optic and feeling of wood, stone and other natural materials, and be inspired by their wearing comfort!