Vanity frame was made out of wood and ply. I took measurements for limestone, allowing for mitres. Stuck 1 inch masking tape to edge where mitres are (on face of panel ). First fitted top piece using clear Silicon, then all other pieces on Silicon , but at the same time with plenty of cream stone glue on mitred part. (Have to push two panels really tide ,so excess stone glue will come out and masking tape will protect face of stone ). When all pieces glued together, just use polisher starting with pads 120, then 220 and 400( depend on stone finish. For high polished marble, you would need to go up to 1000 ) . And when all polishing is done , seal stone with stain stop.