Siliceous or Calcareous?

Before purchasing or attempting to clean your stone surfaces, it’s highly recommended that you identify what type of stone you have.

You can consult with a professional to help determine whether your stone is either siliceous or calcareous. Or you can even conduct your own acid sensitivity test with household vinegar or lemon juice and an eyedropper.

It’s important that you choose an out-of-the-way area on your flooring or countertop, as the test can very quickly and thoroughly, etch your stone. Be sure to apply the test a few inches away from any mortar joints in your stone. If you are testing a countertop, consider applying your agent to the underside of the surface, ensuring any etching will be hidden from regular sight.

Use your eyedropper to apply your chosen acidic agent on your surface, be sure to apply it to a limited area, around the size of a 5 cent coin.

Once applying your agent, you will notice one of two outcomes – If the applied drops start to bubble and fizz on your surface, then your stone is calcareous, which makes it sensitive to acid. If a reaction is extremely minimal or non-existent, then your stone is siliceous.

After conducting your experiment, rinse the area with water and blot with a white towel. If done correctly, the tested area will become un-noticeable or have extremely minimal noticeability. Although testing highly acid sensitive stone like limestone will leave a dull spot where your test took place.

That’s it! You’ve now conducted your own test of the natural stone in your home.

You’re a scientist now! 😊