Borealis limestone, also known as ring or shell limestone, is largely composed of the spores of the borealis borealis fossils. This distinctive sedimentary layer was formed at the beginning of the Silurian era, around 440 million years ago, when the Estonian area was covered by a tropical shallow sea.
Colours of this stone vary between light beige, pink and purple tones, sometimes yellow with white ring patterns of fossilized cones inside.
Suitable for interior use as floor and wall tiles. 1cm thick tile of borealis limestone is very effective with backlighting. A stone that is extremely rare and highly valued in the world, with good workability and eye-catching apparance.