Basalt Tile Forms

Tile forms for concrete. Use with strips of 1/8" material cut to semi-random lengths (I used hardboard cut between 4" and 9" long sprayed with PAM - https://www.lowes.com/pd/47-75-in-x-7-98-ft-Smooth-Brown-Wall-Panel/3014304)
Stick the strips in the forms and pour in the concrete. We used regular quickrete with charcoal coloring at a half bottle per 80lb bag. Smoothed a little once it started setting and beveled the corners.