Marble is a common material for kitchen and bathroom surfaces. Protective gear and a wet saw with a diamond blade are required to cut through a marble slab safely. Draw a line on the marble with a pencil to indicate where you want to cut it, and then feed the slab in slowly. Make a small cut on the backside of the slab first to avoid chipping or shattering it, and then complete the cut on the front. Marble may be cut at home without the help of a professional if you have the correct tools and equipment.
Cutting Marble And Sharpening The Saw
Get Your Hands On A Wet Saw Equipped With A Diamond Blade, Either By Renting Or Buying One.
Stone slabs are best cut with a wet saw equipped with a diamond blade to ensure a precise and clean slicing edge. It may be more cost-effective to rent a saw to cut marble than to buy one if you only need to do so for a few projects. Buying your own saw could save you time and money if you plan on doing a lot of DIY house repairs.
Invest in a high-quality wet saw. Marble slabs larger than 15 inches (38 cm) in diameter will be difficult to cut with a tabletop wet saw, which is the type most typically offered for rent. If you need help deciding which saw is right for your project, see a store representative. Use a circular saw fitted with a diamond blade to cut thin slabs (the kind used for shower walls and countertops).
Get Familiar With The Saw’s Operating Instructions In The Manual.
You could seriously hurt yourself if you try to cut marble without first learning proper saw safety procedures. Each model is slightly different, so be sure to read the installation guide and safety information that came with your specific unit. In this manner, you may confidently and skillfully cut the marble slab because you have a thorough understanding of your model.
Put In A Water Hose From The Faucet To The Saw.
The blade of a wet saw must be kept moist at all times when in use to prevent overheating. Marble can be erroneously or inconsistently cut if the blade gets too hot. Depending on your model, you’ll either need to fill the saw’s own water tank or attach a hose to it.
Protect The Marble From Scratches By Placing It On A Large, Strong Piece Of Foam.
Get yourself a big chunk of foam from the art store. Put this down on the cutting surface to keep your marble flat and safe. The marble is protected from scratches by the foam platform of the saw as you move it across the saw’s cutting surface. The cutting process can be simplified by first affixing the foam to a sheet of 3/4-inch (1.9-cm) plywood. Attach the foam to the wood with transparent silicone and let it dry before cutting.
Next, place the board on a saw horse so you can work at a more manageable height while sawing. The foam must be bigger than your marble. In the absence of foam, any smooth, non-abrasive surface will do; cardboard, for example.
Create A Marker On The Marble To Use As A Point Of Reference.
Mark the marble with a pencil at the precise location you intend to make your cut. If you want to make sure your line is perfectly straight, you can use a ruler or tape measure. Make sure the mark stands out clearly so you can follow it with the saw. If you don’t have a pencil handy, you can use tape to make your imprint on the marble. The line will be more visible on the black stone if you do this.
Put Some Water On The Leading Edge Of The Blade To Keep It From Sticking.
It’s recommended to fill a cup with water and pour it over the saw blade before turning it on. Once you turn on the saw, it will automatically start to soak up water, so you don’t need to use a certain amount.
Wear Gloves To Keep Your Hands Safe From Harm.
Wearing protective gloves will protect your fingertips from being harmed when you cut the stone. Choose some gloves made from sturdy, long-lasting material like canvas.
Wear Earplugs If You Need To Shield Your Ears From The Sound.
Wear earplugs when operating the saw to prevent damage to your hearing. When the blade hits the stone, it makes a sharp, piercing sound. Because of how near you are to the saw, the loud noise could potentially cause hearing loss. These earplugs are also commonly worn when operating loud machinery like a jackhammer or lawnmower.
Protect Your Eyes From Flying Debris By Donning A Pair Of Safety Goggles.
When using a wet saw, tiny marble chips might fly up and potentially get stuck in your eye. Be sure the goggles cover your entire eye when you put them on.
Do Not Go Around In Baggy Clothes Or Sandals.
Wearing loose clothing increases the risk of getting cut since the saw can catch on the excess material. Putting on well-fitting garments is one way to avoid this. Keep your feet covered so you don’t get cut on sharp marble shards. Put on something sensible, like boots or sneakers.
Keep Long Hair Secured So That It Doesn’t Cause Any Accidents.
Long hair, like slacks, can be stuck in a knife. If your hair is medium length or longer, use a headband; if it’s short, use an elastic hair tie or scrunchy. 
Put The Marble Slab In The Right Place Relative To The Knife.
The right side to cut from is saw-specific. The marble should be positioned so that the correct side of the blade is against it. If you use the wrong side, you could accidentally reduce the slab’s length. The blade removes around 1/8 inch (0.32) of material, so be sure that 1/8 inch (0.32) comes from the scrap side and not the side you intend to use. 
Using a scrap of marble as a test piece, you may determine which side of the blade is best for cutting.
Make sure the stone is firmly secured so it doesn’t move while you’re working on it. Use caution when clamping your marble, and choose a hand clamp with padded hands.
Cut The Stone Gently And Slowly To Prevent Cracking.
The slab is more likely to chip, splinter, or break the faster you pass the marble through the blade. To avoid this, take your time when cutting, and let the machine do the heavy lifting.
If smoke is coming out of the blade as you cut, ease up. You could try sawing a small section, pausing briefly to pull back the saw, and then starting the next small section.
Try out a few slices on a scrap slab to see how different cutting speeds affect the marble. With the reverse side of the marble facing up, make a 1 to 3-inch (2.5 to 7.6 cm) long cut.
Place the marble, cut side down, onto the foam. When you’re ready to use it, turn on the saw and feed the marble slowly until you’ve cut roughly 1 to 3 inches (2.5-7.6 centimetres) and then stop. It is possible to prevent the marble slab from chipping and breaking by making a small cut at the back. If you don’t do this, the tile’s edge can chip off when you’re slicing it.
To Finish The Cut, You’ll Need To Flip The Marble Slab Over.
After making a thin cut on the reverse side, the slab should be flipped over so the cut side is now facing up. To continue, move to the opposite end of the slab and begin cutting. Carry on cutting until you have made a clean, even cut through the slab.
After you’ve made your cut, be sure to power down your machine. To avoid injury, always unplug the saw when it’s not in use. This should be done after you have completed your project or after you have cut several pieces of marble.
Use Fine-grit Sandpaper, Either Dry Or Wet, To Smooth Off Any Sharp Corners.
The diamond blade makes a clean cut, although the marble may have rougher edges afterward. If you want, you can use wet or dry sandpaper to manually round off the edges.
Put Away The Wet Saw And Straighten Out Your Work Area.
When you’re done, use an all-purpose cleaner and a clean rag to wash down the counters and your saw when it’s cool to the touch. In order to avoid accidents and keep your equipment in good condition, you should clean your workspace after each use.
A Dry Cut Diamond Wheel On A Grinder Is What You Need For The Last-Minute Polishing.
You might want to make some tweaks to the marble’s shape after you’ve cut it roughly to your specifications.
No tool is superior to a wet saw when it comes to cutting marble. Hence safety is the most crucial thing to keep in mind while doing this.