Spade bits are weaker than regular bits and could bend under too much pressure. It's best to use this bit on soft types of marble, such as tumbled marble.

If you just need to drill a few holes with the same diameter, then just buy a single drill. Most people though will need to drill different sized holes, and when that is the case, then a set of drill bits is more economical Core bits are tipped with either diamond or carbide. Core bits have a central pilot bit that holds the bit in place while the outer sections of the bit drill through marble and granite. Core bits are commonly used to make larger holes bigger than 1/2 inch. Spade Bit Travertine offers neutral tones such as sandstone. Like limestone it is also very porous so will need regular sealing. If used in small amounts in walls it can look great but is subject to staining easily. Similar to normal drill bits you may use for metal or wood, the diamond-tipped bit is tipped with diamond chunks. Made for dry drilling, this bit can forge holes in the hardest types of marble in seconds. Carbide Tipped Bit It’s necessary to protect yourself whenever you’re doing a DIY project. Be sure to use proper protective equipment, especially when you are operating a drill. Ear protection and goggles for your eyes will help protect against any dust or debris.Before drilling a hole through marble, you have to choose the right bit. These bits are easy to use with your regular drill or a hammer drill. Diamond Tipped Bit

Limestone is not hugely popular as a tile though it is really good if you are trying to create a rustic look. Unfortunately limestone is very porous so will need regular sealing. It isn't a tile we would recommend. You can get either honed stone or polished stone. Honed tends to be used on floors, and polished on walls or areas with a low foot fall. Slate is usually only used for great looking floors. Marble can also be used for worktops as can slate in some cases. Compared to the above two types, core bits are different. For starters, they are tipped with carbide or diamond. They have a central pilot bit and outer bit. The central pilot bit holds the drill bit in place while the outer bit drills through the object. These core bits are perfect if you plan to create a hole larger than ½ inch. Before you start drilling, create a workspace that is free of people, clutter, and debris. Any clutter near your drilling surface may move once the drill is activated, which could cause your drill to slip. Tungsten carbide bits make drilling through tiles pretty easy. You do need to use these with a drill that has a slow speed so a variable speed electric drill is a must.If you just need a single hole use a cheap masonry bit and then throw it away. If you need several holes then buy a set of decent quality bits. Typically, spade bits are a little weaker than normal drill bits. Most often, they will bend when exposed to too much pressure. Hence, spade bits should be used with a softer marble surface, such as tumbled marble. Most marble cuttings needed for a larger home renovation use a wet tile saw. However, for smaller circular cuts in your kitchen or bathroom, you'll need a drill bit to penetrate marble. Need an extra electrical outlet or room for a power cord? Here’s how to drill through marble safely. Types of Marble Drill Bits Porcelain tiles need a special drill bit for best results, but any of the sets we mentioned above will get the job done. Other types of tiles and hard surfaces like slate, marble and granite can be drilled through using a tungsten carbide bit, or a diamond tipped bit.