STRONGS G2393:
													
												
									    		ἴασπις, 
-ιδος, 
ἡ, [from Plato down], 
jasper; a precious stone of divers colors (for some are purple, others blue, others green, and others of the color of brass; Pliny, h. n. 37, 37 (8)): 
Revelation 4:3; 
Revelation 21:11, 
18f. [But many think (questionably) the 
diamond to be meant here; others the 
precious opal; see 
Riehm, HWB, under the word Edelsteine, 8 and 10; 
B. D. under the word Jasper; cf. 'Bible Educator' 2:352.] 
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