Is it possible to make a countertop using remnant pieces of granite cut into 12x12 tiles, then put onto plywood? Would we grout with epoxy?

Repurposing old remnants is a great solution for green countertops and for the environment. Yes!

You can install granite tiles in much the same way you would install any kitchen tiles. 

• The difference is that your granite tiles will be quite a bit thicker.
• I recommend a powered tile saw with a sliding table to cut small remnant pieces.

Much less expensive to rent than buy a saw

The best way to get the right tool for the job is to go to a local tool rental center (many Home Depot stores have these) and ask what they suggest for this particular job.

• Since you can cut all of your tile pieces in one day, it is much less expensive to rent rather than buy a machine.
• Renting is also better for the environment.
• Renting is a way to share tools rather than each of us buying another "made in China" tool for the one small job we each have.

Try odd-shaped cuts

I encourage you to be creative. You may want to try patterns or odd-shaped cuts. Perhaps a combination of square-cut and rectangular-cut pieces would look good.

Try going to a tile store to view patterns of their tiles to get ideas, or look online at tile patterns.

Installation

When you are ready to adhere the tiles, I suggest you use a concrete backing board over your plywood base and then mortar and grout, just as you would if you were applying ceramic tiles. 

• You can place the granite tiles against each other if you don't want grout lines. 
• Epoxy is likely to have a higher VOC (volatile organic compounds) level than the mortar.
• Again, just follow the same directions you would if you were installing ceramic tiles.

Thanks for reusing old remnants. This is a great way to reduce, reuse, and recycle. Every time we can avoid buying new products, we limit our environmental footprint.