jasper
Word family
- jasperwarenounC2
Synonym discussion
Sense: noun/1
Jasper, agate, and chalcedony are all forms of quartz, but they differ in appearance. Chalcedony is the broadest term — it refers to any fine-grained quartz with a fibrous or microcrystalline structure. Jasper is a type of chalcedony that is completely opaque and often contains iron oxides that give it red, yellow, brown, or green colors. Agate is also a type of chalcedony but has distinctive bands or layers of color and is often translucent. In everyday use: a ring with a uniform red, opaque stone would be called jasper; a bracelet with wavy bands of color that you can see light through would be called agate; and a general milky or gray translucent stone without strong patterns would simply be called chalcedony.
Common collocations
Etymology
The word 'jasper' entered English through Old French 'jaspre', from Latin 'iaspidem' (accusative of 'iaspis'), which was borrowed from Greek 'iaspis'. The Greek word itself probably came from a Semitic source — compare Hebrew 'yashpeh', which appears in the Bible as a stone in the high priest's breastplate. The gemstone has been known and valued since ancient times across many cultures.
First known use
14th century
14th century, in the meaning defined at sense 1