Offset Square Pendant Mold

The Offset Square Pendant Mold from Colour de Verre is a reusable ceramic casting mold that produces six square pendants in three sizes from a single firing. The cavities yield two pendants at each size: a large at 1.675 inches (42 mm), a medium at 1.375 inches (35 mm), and a small at 1.125 inches (28 mm). Fill weights are 20 grams for the large pendant, 15 grams for the medium, and 7 grams for the small.

The mold measures 7.75 by 5.5 by 1 inch (20 by 14 by 2.5 cm). It works with frit, fine powders, thin sheet glass, and thin dichroic glass, and the ceramic body is COE agnostic, so it accepts any compatible fusible glass. Finished pendants can be strung on leather, silk, rubber, or metal cord. Prime the cavities before every use and fire to cast the square pendant shapes.

What does the Offset Square Pendant Mold make?
It casts six square pendants per firing, two at each of three sizes: 1.675 inches (42 mm), 1.375 inches (35 mm), and 1.125 inches (28 mm). Each cavity can be loaded with different colors or glass types in the same firing.

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 pendant?
Colour de Verre lists 20 grams for the large cavity, 15 grams for the medium, and 7 grams for the small. Weigh your glass for each cavity and test a first firing when the result matters.

What kinds of glass work in this mold?
Frit, fine powders, thin sheet glass, and thin dichroic glass all work. Match the firing schedule to your chosen glass type and COE.

How do I prep the mold before each firing?
Prime all cavities before every use with a boron nitride separator and let the primer dry completely before loading glass so the cast pieces release cleanly.

Specifications

• SKU: 181800
• Manufacturer: Colour de Verre
• Makes: 6 square pendants in 3 sizes per firing (2 per size)
• Finished piece sizes: 1.675 in (42 mm), 1.375 in (35 mm), 1.125 in (28 mm)
• Fill weights: 20g (large), 15g (medium), 7g (small)
• Mold size: 7.75 in L x 5.5 in W x 1 in H (20 x 14 x 2.5 cm)
• Compatible glass: frit, fine powder, thin sheet, dichroic
• 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 a casting schedule suited to your glass and kiln.

• Prime all cavities before every use with ZYP Boron Nitride Mold Primer or Hotline Primo Primer. Let the primer dry completely before loading glass so cast pieces release cleanly.
• Fill cavities with frit, fine powder, thin sheet glass, or thin dichroic. Use the fill weights as a starting point: 20g for the large pendant, 15g for the medium, and 7g for the small.
• The mold is COE agnostic. Use a casting schedule matched to your glass and COE.
• Let the kiln cool fully before removing cast pieces. Re-prime all cavities before each subsequent firing.

Colour de Verre Suggested Firing Schedule

This is a suggested starting schedule, not a guarantee. Every kiln fires differently. Follow the Colour de Verre project sheet for this mold and test a small run first before committing to a full batch.

• Heat no faster than about 350 F (195 C) per hour to avoid thermal shock to the mold and glass.
• Fire to a maximum of about 1450 F (785 C). Do not exceed this temperature with Colour de Verre ceramic molds.
• Hold briefly at peak temperature, then begin a controlled descent to your anneal soak: about 900 F for COE90 or about 950 F for COE96.
• Hold at the anneal temperature, then allow the kiln to cool fully before opening.

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

Description updated: July 6, 2026

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