Clean your quartz countertop with soap and water, and allow it to dry thoroughly.
Apply a thin coat of tile adhesive to the back of your tile using a paint stirrer or a craft stick. A paint stirrer works well for a larger tile, while a craft stick is appropriate for a small mosaic tile. There are several types of adhesive that can be used for this purpose. A clear epoxy, spread to 3/16-inch thickness across the back of the tile, leaving a 1/2-inch border of tile around the glued area works well. You may also use powerful all-purpose adhesives such as Loctite and Liquid Nails.
Press the tile, back first, to the quartz countertop. Ceramic tile is already baked and glazed, and laminate tile has its own protective covering, so you will not need a sealer
Repeat until you have created the effect that you wish.
Allow the tile adhesive to cure completely. The time required is described on the adhesive’s packaging.