Covered In This Article
- An examination of what marble is
- Painting a marble effect two different ways
An Introduction to Marble
Marble is a type of rock formed when limestone is exposed to high temperatures and pressures. During this time, the calcite (rock-forming material made of calcium rather than silicates) that forms the limestone recrystallizes into a denser rock. The crystals in the rock are what give marble its characteristic appearance. Impurities in the rock, such as quartz, graphite, pyrite, and other materials, cause the marble to take on other colors (that's how you get pink marble, for example).
Unpolished marble. Credit: Joelle Icard, Getty ImagesAs a building material, marble has been in use for thousands of years. Because of the way marble forms, it occurs commonly and there are large deposits of the material worldwide, making it relatively cheap and easy to mine. Although crushed marble is used to build everything from roads to railroad beds, the material is prized for its beauty and used in architecture and sculpture around the world. The Taj Mahal was constructed entirely from white Makrana marble, while the statue of Abraham Lincoln was constructed from white Marble mined in Georgia. Michaelangelo's famous statue of David in Florence was constructed from white marble mined in Tuscany.
Marble that has been cut into blocks and polished will typically have the trademark veined texture that people associate with marble, though marble can come in many colors and variations.
Weathering Marble
Marble is particularly susceptible to acid rain and weathering, and wears down over time. Anyone who has visited Florence to see the aforementioned statue of David may recall that the statue on display outdoors in the Piazza della Signora is not the original statue - the original was moved indoors to the Accademia Gallery in 1873 to prevent damage from the weather and uneven ground beneath the statue. The most common ways that marble will be affected by weather and outdoor conditions are cracking and erosion from acid rain.Acid Rain
Marble is a porous material (moreso than granite) and is particularly susceptible to acid rain. Sulfurous, Sulfuric, and Nitric acids in the air that get into the rain react with the calcite in marble, producing soluble salts that dissolve in the water. The effect causes streaking and erosion as parts of the statues are washed away -- sharp edges and carving details eventually become rounded and dulled. Sheltered areas are more likely to develop blackened crusts that peel off over time and reveal crumbled stone underneath. This crust is made of gypsum, a mineral that forms when you mix calcite, sulfuric acid, and water. It's water soluble and usually washed away, but protected areas like those under overhangs will develop a black crust over time.
Marble statue of George Washington. Credit: Spencer Platt
Cracking
Although stone, marble is a relatively soft material that can be scratched, scraped, and chipped rather easily. Marble plates that have too much weight placed on them will crack, typically breaking into smaller plates.
Parting Thoughts
Hopefully these approaches have inspired you to conduct your own research and work out your own method for painting marble, or they've given you what you need to achieve the visual effects you were going for.Have any questions or feedback? Drop us a note in the comments below or email us at contact@goonhammer.com. Want articles like this linked in your inbox every Monday morning? Sign up for our newsletter. And don’t forget that you can support us on Patreon for backer rewards like early video content, Administratum access, an ad-free experience on our website and more.
How to Paint Everything: Painting Marble

















