"iaspis". Lexicon. Blue Letter Bible. Strong's G2393. Archived from the original on 22 May 2016.
blueletterbible.org
cf.blueletterbible.org
"iaspis". Lexicon. Blue Letter Bible. Strong's G2393. Archived from the original on 22 May 2016.
cmich.edu
cst.cmich.edu
Dietrich, R.V. (23 May 2005). "Jasper". cst.cmich.edu. GemRocks. Central Michigan University. Archived from the original on 9 March 2012. Retrieved 16 October 2006.
doi.org
Moore, D.T.; Oddy, W.A. (1 January 1985). "Touchstones: Some aspects of their nomenclature, petrography and provenance". Journal of Archaeological Science. 12 (1): 59–80. Bibcode:1985JArSc..12...59M. doi:10.1016/0305-4403(85)90015-9.
"Jasper". Gem by Gem. International Colored Gemstone Association.
harvard.edu
ui.adsabs.harvard.edu
Moore, D.T.; Oddy, W.A. (1 January 1985). "Touchstones: Some aspects of their nomenclature, petrography and provenance". Journal of Archaeological Science. 12 (1): 59–80. Bibcode:1985JArSc..12...59M. doi:10.1016/0305-4403(85)90015-9.
Dietrich, R.V. (23 May 2005). "Jasper". cst.cmich.edu. GemRocks. Central Michigan University. Archived from the original on 9 March 2012. Retrieved 16 October 2006.
wikisource.org
en.wikisource.org
One or more of the preceding sentences incorporates text from a publication now in the public domain: Rudler, Frederick William (1911). "Jasper". In Chisholm, Hugh (ed.). Encyclopædia Britannica (11th ed.). Cambridge University Press.