Gim-cyn

According to the Old English Dictionary:

gym-cyn, -cynn, es;

gim-cyn

n. A gem-kind, a precious stone, a gem; genus gemmarum, gemma :-- Se forma feohgítsere gróf æfter gimcynnum the first miser delved after precious stones, Bt. Met. Fox 8, 114; Met. 8, 57: 15, 8; Met. 15, 4. On ðære éðyltyrf niððas findaþ gold and gymcynn in that country men find gold and gems, Cd. 12; Th. 14, 29; Gen. 226: Elen. Kmbl. 2046; El. 1024. gim-cyn