From Longman Dictionary of Contemporary Englishjasperjas‧per /ˈdʒæspə $ -ər/ noun [uncountable] 
HEGDCJa red, yellow, or brown stone that is not very valuable
HEGDCJa red, yellow, or brown stone that is not very valuableExamples from the Corpus
jasper• The cross is a masterpiece of red jasper, gold, gilded silver and jewels and dates from the eleventh or twelfth-centuries.Origin jasper (1200-1300) Anglo-French jaspre, from Latin jaspis, from Greek 