ἴασπις, -ιδος, ἡ
[in LXX: Exo.28:18 36:38 (Exo.39:11) (יַהֲלֹם), Isa.54:12 (כַּדְכֹּד), Eze.28:13 (יָשְׁפֵה, see BDB, Lex., see word)* ;]
jasper, apparently not the modern stone of that name, but a translucent stone (DB, see word): Rev.4:3 21:11, 18-19.†
(AS)