Drilling into a Quartzite countertop can be a challenging task as it is a hard and dense material. Here are the steps to follow to drill into a Quartzite countertop:

1. Mark the Spot - First, use a marker or painters tape to mark the spot where you want to drill the hole.

2. Choose the Right Drill Bit - A diamond-tipped or carbide-tipped drill bit is the best option for drilling into a Quartzite countertop. Select the right size of drill bit that is appropriate for the job.

3. Apply Lubricant - To avoid overheating and damaging the countertop, it is crucial to apply a lubricant while drilling. Water is an effective lubricant that can reduce friction and keep the drill bit cool.

4. Start Drilling - Hold the drill straight and steady and apply pressure firmly and evenly. Start slowly at first and gradually increase the speed as needed. Continue drilling until the hole is complete.

5. Clean Up - After drilling, clean up the area around the hole and remove any dust or debris.

It is advisable to practice drilling on a spare piece of Quartzite before attempting it on the countertop. You can also seek professional help to ensure that the drilling is done correctly and without damage.