Gim

According to the Old English Dictionary:

gimm, gym, gymm;

GIM

gen. gimmes; m. I. a GEM, jewel;gemma :-- Se stán bið blæc gym the stone is a black gem, Bd. 1, 1; S. 473, 24. Ðæt nebb líxeþ swá glæs oððe gim the beak glitters like glass or gem, Exon. 60 a; Th. 218, 25; Ph. 300. Gim sceal on hringe standan steáp the gem shall stand prominent in the ring, Menol. Fox 504; Gn. C. 22: Salm. Kmbl 570; Sal. 284. Gimmas líxton jewels glittered, Elen. Kmbl. 180; El. 90. Seó gesomnung ðara deórwyrþra gimma the collection of the precious gems, Blickl. Homl. 99, 28. Se ðe wæs gescríd mid golde and mid gimmum he that was clad with gold and with gems, Chr. 1086; Erl. 221, 3: Cd. 227; Th. 305, 20; Sat. 649. Hí wurdon gehwyrfede to deórwurþum gimmum they were turned to precious gems, Homl. Th. i. 64, 5. II. used metaphorically of the eye, the sun, stars, etc. [cf. Icel. fagr-gim = sun] :-- He his eágan ontýnde hálge heáfdes gimmas he unclosed his eyes, the head's holy gems, Exon. 51 b; Th. 180, 7; Gú. 1276. Hluttor heofenes gim the clear jewel of heaven, i.e. the sun, 58 b; Th. 210, 9; Ph. 183: 63 a; Th. 232, 33; Ph. 516: Beo. Th. 4151; B. 2072: Andr. Kmbl. 2538; An. 1270. Iunius on ðam gim astíhþ on heofenas up hýhst on geáre June in which the gem [sun] rises in the heavens highest in the year, Menol. Fox 216; Men. 109. Hálge gimmas heofontungol sunne and móna holy gems, stars of heaven, sun and moon, Exon. 18 a; Th. 43, 22, 27; Cri. 692, 695. [Laym. ȝim: later MS. gim: Icel. [poetry] gim; n: O. H. Ger. gimma; f.] gim