pâte de verre
/ˌpɑːt də ˈvɛː/ /ˌpat də ˈvɛː/(also pate de verre)
noun
A substance made by firing a paste made of crushed glass bound with water and an organic gum; an object made from this.
Origin
Early 20th century. From French pâte de verre (not dated in dictionaries of French) from pâte + de + verre glass.