Rinse them well when you’re done and let them air dry.
Identify stained quartz by finding the red and brown patches on the crystals. Quartz is a very strong stone, and it will hold up to scouring while you scrub the red away.
Also, take the time to “shape” the stone into roughly what you want the final stone to look like; grind off any areas you don’t want. Use diamond-crusted or edged tools for this project, as quartz is very hard. Put on goggles and protective gloves to protect yourself.
At the end, use very fine grit sandpaper.
Denim, corduroy, or upholstery fabric work well for this.
For home use, you have the options of a toy rock tumbler with a plastic barrel or a hobby tumbler. For quartz, a hobby tumbler is better as it is a tough rock to tumble. [7] X Research source
Add enough water so you can just see it in the rocks.
If you take any stones out, replace them with new ones or use plastic pellet fillers to make the tumbler 3/4 of the way full. Add another 1 tablespoon (24 grams) of aluminum oxide for each 1 pound (0. 45 kg) of rocks.
Save the plastic pellets and write down that you used 60/90 grit on them. You can use them again but only with that grit level.
Run it for 1-2 to weeks before cleaning and switching to 500 fine polish in the same proportions. Run it for another 1-2 weeks.
Wash the tumbler and rocks thoroughly.
Wash and dry the rock to see if it’s shiny enough.
Rinse it with clean water when you’re done.
You can even use glass and surface cleaners on these counters. [17] X Research source For a grease stain, opt for a grease-removing cleaner. [18] X Research source
Similarly, skip harsh cleaning chemicals. Quartz countertops have resins holding them together, and the chemicals could damage those. Skip polishing quartz countertops. These countertops are a composite of resin and quartz rock, so they don’t need polishing. They don’t require sealing either. All in all, they are relatively low maintenance. [21] X Research source