Both marble and limestone are formed under similar circumstances and are products of nature. That said, there are a number of ways in which they differ and, when choosing worktops for your kitchen, it is important to understand these differences so that you can make an informed decision.
In terms of colour, limestone is generally available in different tones of grey, brown or tan. Marble, on the other hand, is available in a wider range of colours including different shades of white, pink, blue, red, green and even black! When looking for a specific colour, marble is quite often the winner.
In terms of density and durability, limestone and marble don’t differ much. Marble, due to its formation under heat and pressure, is slightly more durable and somewhat less porous. This means that marble is marginally less susceptible to stains. That said, both can be sealed upon installation which will help protect them from damage.
Both stones are sensitive to acidic substances like lemon juice and vinegar. Spills need to be cleaned promptly and properly. If the surface shows signs of permanent damage, it can be resurfaced or rehoned if need be.
As for price, limestone is usually cheaper since it is so widely available. Other factors that will influence the price of the stone are colour, where the stone was mined and treatment(s) applied to the stone. So, a highly polished or rare colour limestone can cost more than some types of marble.