Flint

According to the Old English Dictionary:

es;

FLINT

m. FLINT, a rock; sĭlex, petra :-- Flint sĭlex, Ælfc. Gl. 58; Som. 67, 94; Wrt. Voc. 38, 19: 85, 21. Flinte ic eom heardra I am harder than flint, Exon. 111b; Th. 426, 23; Rä. 41, 78. Ðæt ðú gesomnige flint unbrǽcne that thou unite the unfragile flint, Exon. 8a; Th. 1, 11; Cri. 6: Salm. Kmbl. 202; Sal. 100. Flintum heardran harder than flints, Exon. 25a; Th. 73, 13; Cri. 1189. Híg cómon to ðam flinte, and Moyses ætfóran him eallum slóh mid ðære girde túwa ðone flint, and fleów sóna of ðam flinte wæter they came to the rock, and Moses struck the rock twice with his rod before them all, and immediately water flowed from (he rock, Num. 20, 10, 11. [M. H. Ger. vlins, m. sĭlex: Dan. flint, m. f: Swed. flinta, f.] flint