Geometric Beads Mold

The Geometric Beads Mold from Colour de Verre casts six glass beads per firing: three triangular and three square, each measuring approximately 1 inch (25 mm) across. The mold sits on a footprint of 4.5 inches by 6.5 inches and is 1 inch deep, giving you a compact way to produce a batch of shaped beads in a single run.

The precision-made cavities mean the beads come out with little to no cold work required, no grinding or polishing needed after firing. String them on leather, rubber, or silk cord, or wire-wrap them for jewelry designs ranging from casual to more structured. The beads also work as accents on plates, platters, or mixed media pieces.

Like all ceramic casting molds, this one is COE agnostic. Fill each of the six cavities with about 6 grams of frit and fuse to the geometric bead shape. The mold is reusable across many firings when primed and cared for properly.

What does the Geometric Beads Mold make?
It casts three triangular beads and three square beads per firing, each approximately 1 inch (25 mm) across.

What COE glass can I use?
Any COE. Ceramic casting molds are COE agnostic, so the same mold works with COE96, COE90, or other fusible glass. Match your firing schedule to the glass you are using.

How much glass do I need per bead?
Colour de Verre lists 6 grams per cavity. Weigh your frit and test a first run when the result matters.

Do the beads need finishing after casting?
Generally little or none. The mold is precision-made so the beads typically come out ready to use, with no grinding or polishing needed in most cases.

How do I prep the mold before casting?
Prime all cavities before every use with a boron nitride mold primer and let it dry completely before adding glass so the beads release cleanly.

Specifications

• SKU: 181805
• Manufacturer: Colour de Verre
• Makes: 3 triangular beads and 3 square beads per firing
• Finished piece size: about 1 inch (25 mm) each
• Mold size: 4.5 inches L x 6.5 inches W x 1 inch deep
• Fill weight: 6 grams per cavity
• Material: ceramic kiln casting mold, reusable
• Glass: any COE (COE agnostic)

Working Notes

These are guidelines, not guarantees. Every kiln fires a little differently, so test a small run first when the result matters and follow the Colour de Verre project sheet for this mold.

• Prime all six cavities before every use with ZYP Boron Nitride Mold Primer or Hotline Primo Primer, and let it dry completely before adding glass.
• Fill each cavity with about 6 grams of frit. Frit size and fill level affect the finished surface, so weigh your glass and test a first run before committing to a full batch.
• The mold is COE agnostic. Match your firing schedule to the glass COE you are using.
• Heat no faster than about 350 F (195 C) per hour to protect the mold and allow the glass to heat evenly.
• Fire to no more than about 1450 F (785 C).
• Include a controlled cool with an anneal soak matched to your glass type.
• Let the kiln cool fully before removing the cast beads. Re-coat the mold with primer before the next firing.

Suggested Firing Schedule

This is a suggested starting point based on Colour de Verre general guidance, not a guarantee. Every kiln fires differently. Follow the Colour de Verre project sheet for this mold and test a small run first.

• Ramp rate: no faster than about 350 F (195 C) per hour through the full ramp.
• Top temperature: no more than about 1450 F (785 C).
• Anneal soak: about 950 F for COE96, or about 900 F for COE90.
• Cool in a controlled way to room temperature before opening the kiln.

Helpful downloads: Priming with ZYP Spray (PDF) · Tricks of the Trade (PDF)

Description updated: July 6, 2026

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