Why Is My Black Granite Headstone Fading or Turning Grey?
Why some black headstones turn grey or patchy — dyed or waxed stone, hard-water film, dull polish — how to tell which it is, and what can be done.
Genuine, dense black granite keeps its colour. If a "black" headstone turns grey, blotchy or brownish after a few seasons, one of these is usually the cause.
1. Dyed or waxed stone
Some lower-grade dark stones are coloured with dye, oil or wax to look deeper black. Sun and rain gradually remove the treatment and the true, lighter colour shows through — often unevenly.
Signs: fading is patchy; a cloth with acetone (tested on the back) picks up black colour.
2. Hard-water or mineral film
Sprinklers and hard water leave a grey-white film that dulls the face.
Signs: the stone looks darker when wet, and the film is worst where sprinklers hit. See white spots on headstones.
3. Worn or poor polish
A shallow factory polish dulls over time, making black look grey.
Signs: even dullness across the face, no colour on a test cloth.
What can be done
| Cause | Remedy |
|---|---|
| Mineral film | Gentle cleaning with water and a soft brush; a stone-safe cleaner for stubborn deposits |
| Dull polish | Professional on-site repolishing |
| Dyed or waxed stone | Re-treatment is only temporary; replacement may be the long-term fix |
How to avoid it
- Buy from a supplier who states the granite's quarry and confirms it is untreated.
- Ask for a sample and try the acetone test before ordering.
- See how to tell high-quality granite.
Key Takeaways
- Genuine black granite doesn't fade; treated stone does.
- Mineral film and dull polish also make black look grey.
- Ask for untreated, quarry-named granite before buying.
Next Step
Read about Absolute Black and other black granites or request a quote.
Frequently Asked Questions
Does black granite fade in the sun?
Genuine, untreated black granite doesn't fade. Dyed or waxed dark stones can lose their colour as the treatment weathers away.
How do I know if my black granite is dyed?
Rub acetone on an inconspicuous spot with a white cloth. Black colour on the cloth suggests the stone was dyed or treated.
Can a faded headstone be restored?
Mineral film can be cleaned and dull polish can be professionally repolished. Treated stone may need replacement for a lasting fix.
Ready to get pricing for your granite monument?
Request pricing, factory specifications, and DAP delivery timelines from our team.
Related guides
Grey Granite Monuments
Grey and Colored Granite Headstones
Black Granite Monuments
Does Headstone Colour Have a Meaning?
Laser Etched Portrait Headstones on Black Granite
