Quartz is a non-porous mineral and makes an excellent surface for countertops in kitchens and bathrooms and is also used in sculptures and decorative pieces. Most quartz items are made of 95% ground quartz and 5% of a polymer resin to hold the ground quartz together. Quartz is a very durable material and is also resistant to scratching. Although the surface is scratch resistant, cutting on top of quartz, dropping heavy objects on it, or dropping pieces of quartz, could lead to a scratches. If scratches do occur in the quartz they can easily be repaired with a few steps.
Clean the quartz with soapy water and a cloth or an ammonia based cleaner. Be sure to also clean any scratched areas as well. Dry the surface with a dry cloth.
Fill any deep scratches with a fast drying glue, such as super glue. Allow the glue to dry for 24 hours.
Scrape over the dried glue with a razor blade, to remove any excess glue. This should make the surface perfectly flat, but it may still feel rough.
Sand over the dried glue and any shallow scratches with the sandpaper. Sand the surface until it feels very smooth.
Apply the polishing compound to the wool pad on the buffer. Buff the quartz with the white polishing compound and a buffer at a speed between 1500 and 2000 rpms. This will restore the finish to the quartz.