Lace is not a single material, instead it’s a more of a pattern of delicate fabric.
The good news, is that while lace can be made from a wide variety of material, lace is almost always vegan.
It’s safe to assume that anything made from lace is vegan, it’s rare to find otherwise.
Most of it is made from synthetic fiber like chambray or cambric, which are are both vegan.
Some artists make their own lace using fine wire made of copper or silver, but even that is still fine.