Mosaic Slate Chalkboard

Use colorful mosaic pieces and clay to brighten up a slate chalkboard!
By  Joan Martin Fee 



  • Glass Coaster Store Slate Chalkboard, 12”x8”
  • Polymer clay, black and desired color
  • Plates or tiles in desired colors
  • Mosaic yellow dots, 12mm, eight 
  • Black wire, 22 gauge 
  • Twine


  • Wheeled glass nippers 
  • Gray sanded grout 
  • Polymer clay rolling pin
  • White acrylic paint 
  • Thin paintbrush 
  • Butterfly rubber stamp, 2”
  • Wire cutters 
  • Adhesives: Weldbond Universal Adhesive, E6000 Industrial Strength Adhesive, Glue Dots

basic supplies

  • Sponge
  • Container of water
  • Craft sticks
  • Knife
  • Aluminum foil
  • Mixing bowl
  • Disposable latex gloves
  • Black permanent pen
  • Tile 

This idea was originally published in our 2016 Fall issue. Subscribe today and save off newsstand prices! You’ll get ALL the projects delivered to you in six jam-packed issues per year. 

Project Instructions

1. Cut plates or tiles using wheeled glass nippers to form petals and leaves. For stems, cut random lengths of thin green tile pieces. Layout design on slate as desired. Adhere pieces in place with Weldbond. Let dry.

2. Mix grout and water following manufacturer’s instructions in bowl using craft stick until it reaches peanut butter consistency. Spread grout around mosaic pieces with craft stick or gloved hands. Keep grout off main writing area of chalkboard. Gently remove excess grout with flat end of craft stick. Wipe grout from top of mosaics and smooth edges with damp sponge. Rinse grout from sponge and wring out excess water as you wipe. Let dry overnight.

3. For butterfly, condition clay.  Roll out 2½” diameter circle on tile using rolling pin. Press butterfly stamp into clay and remove stamp. Cut around butterfly with knife. Carefully slide knife under butterfly, lift and place foil under wings to support. For butterfly center, condition black clay and roll 1/8”x1½” snake. Bake following manufacturer’s instructions. Remove from oven and let cool.

4. Add butterfly details with acrylic paint and black permanent pen. For antennae, cut two 1” pieces of wire with wire cutters. Form loose loops on one end of each wire. Adhere antennae under body center with E6000. Let dry. Adhere butterfly as desired on slate. Adhere black center to butterfly.

5. Adhere mosaic yellow dots to center of flowers with Glue Dots as shown. Layer mosaic yellow dots on largest flower with E6000. Let dry. Tie knot in one end of twine and insert into slate hole. Insert other end of twine in opposite hole and tie a secure knot.