COE90 Iridescent

Iridescent COE90 sheet glass carries a metallic-look surface that throws back rainbow, gold, or silver reflections as the viewing angle shifts. This category at Art Glass Supplies is built around Bullseye iridescent sheets, covering transparent and opalescent bases in 2mm thin-rolled and 3mm double-rolled formats, with several textured variants for added surface interest.

What iridescent COE90 glass is

The iridescent face is a permanent shimmering layer that shifts color with light and angle, producing rainbow flashes or warm gold and cool silver tones depending on the finish. The base glass underneath fuses, slumps, cuts, and foils like any other Bullseye sheet, so the iridescent surface becomes a design element you can place show-side up in stained glass or feature in kiln-formed work.

Bullseye finishes and bases in this category

Rainbow iridescent runs across a wide color range here, including Clear, Amethyst, Aquamarine Blue, Caribbean Blue, Carnelian, Chartreuse, Charcoal Gray, Aventurine Blue, and Aventurine Green transparents, plus Black Opalescent. Black Opalescent also appears with gold and silver iridescent finishes, and the Alchemy series adds shifting Silver to Gold and Silver to Bronze transparents. Textured iridescents include Accordion, Reed, Granite Ripple, Herringbone Ripple, Soft Ripple, Prismatic, and patterned surfaces.

Choosing thickness, base, and texture

Thin-rolled 2mm sheets are useful for overlays, caps, and controlled layering where you want finer thickness control than standard 3mm sheet allows; 3mm double-rolled sheets work as a single-layer foundation for most fused projects. Transparent iridescents read brightest with backlight or set over a contrasting opaque layer, while pairing rainbow, gold, or silver finishes with Black Opalescent is the classic way to make the flash pop. Textured iridescents can retain more visible surface character in tack-fuse, contour-fuse, or slumping projects than in a full fuse, but testing is still recommended.

Firing and usage notes

All sheets in this category are COE90 and compatible with other Bullseye COE90 glass for kiln forming; do not mix with COE96 or COE104 systems. A full fuse softens visible sparkle, so many makers tack-fuse, contour-fuse, or place the iridescent side down against shelf paper to preserve maximum shimmer. For stained glass, iridescent sheets score, break, and foil the same as standard Bullseye, letting you bring that shifting surface into copper foil and leaded panels.