KMR156blk Coal Black Concrete Ring


KMR156blk Coal Black Concrete Ring



Defying what is normally thought possible with concrete, this ring at 2.8mm wide features 2mm of coal black concrete on either side. An unconventional idea for a wedding band. Sizes available 5 – 9.5

Prices shown in USD.


Materials Coal Black Concrete + Stainless Steel
Size 2.5mm x 2.8mm
Lead Time 24 hours

Additional information


We use a new generation of concrete for our jewelry called ultra high performance concrete which has the compressive strength of 150 Mpa. Over 20 times stronger than traditional concrete. We offer a lifetime warranty on these rings, if the concrete were to chip or break at anytime, we will replace it.

Sizing Information

If you are unsure of your size, please visit a local jeweler to have your finger sized accurately. Be sure they use a wider sizer, close to the size of the ring as wider rings will fit tighter. Do not use sizing charts as they are always inaccurate.