Quick Definition
ἴασπις, ιδος, ἡ n.f. jasper
Strong's Definition
probably of foreign origin (see 3471); "jasper", a gem
KJV Usage: jasper
UBS Dictionary of the Greek New Testament
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
ἴασπις, -Sos, ἡ, [fr. Plato down], jasper; a precious stone of divers colors (for some are purple, others blue, others creen, and others of the color of brass; Plin. ἢ. n. 37,37 (8)): Rev. iv. 3; xxi.11,18sq. [But many think (questionably) the diamond to be meant here; others the precious opal; see Riehm, AWB. 5. v. Edelsteine, 8 and 10; B. D.s. v. Jasper; ef. ‘ Bible Educator’ ii. 352.]
Mounce Concise Greek Dictionary
ἴασπις iaspis 4x
jasper, a precious stone of various colors, as purple, cerulian green, etc. Rev. 4:3; 21:11, 18, 19*
Abbott-Smith Greek Lexicon
ἴασπις, -ιδος, ἡ,
[in LXX: Ex 28:18 36:18 (39:11) (יַהֲלֹם), Is 54:12 (כַּדְכֹּד), Ez 28:13 (יָשְׁפֵה, v. BDB, Lex., s.v.)*;]
jasper, apparently not the modern stone of that name, but a translucent stone (DB, s.v.): Re 4:3 21:11, 18, 19.†
Moulton & Milligan — Vocabulary of the Greek NT
ἴασπις. Syil 58787. (ν 8.6.) σφραγὶς ἴασπις χρυσὸν δακτύλ[ιον ἔχοσα,] σφραγὶς ἴασπις περικεχρυσωμένη. The word is Phoenician (Boisacq, Ρ. 364).
Liddell-Scott-Jones — Greek-English Lexicon
ἴασπις (iaspis) — jasper. ἴασπ-ῐς, ιδος (but accusative ἴασπιν [Refs 5th c.AD+], ἡ, jasper, [Refs 5th c.BC+]
II. ={χρυσόγονον}, [Refs 1st c.AD+]. (Cf. Hebrew yāšpheh).