spun glass

blown glass in which fine threads of glass form the surface texture.

fiberglass.

Origin of spun glass

First recorded in 1770–80

Carol laughed, the youthful swell of her breasts against the soft, spun-glass material of her blouse.

Blind Spot |Bascom Jones
On the other hand, if divided by parallel lines, so as to look more or less like spun-glass, I call it striated.

Modern Painters, Volume V (of 5) |John Ruskin
The former has heavy bars, which mark the early type prior to tracery, and it has spun-glass doors.

Chats on Cottage and Farmhouse Furniture |Arthur Hayden
He stooped and raised a lock of it on his hand, marveling at its fine texture and its spun-glass appearance.

Louisiana Lou |William West Winter

In every museum you may see specimens of a beautiful vase-like structure seemingly made of spun-glass.

Young Folks' Library, Volume XI (of 20) |Various