noun \ˈjas-pər\

Definition of JASPER

:  an opaque cryptocrystalline quartz of any of several colors; especially :  green chalcedony
:  colored stoneware with raised white decoration
:  a blackish green
jas·pery \-pə-rē\ adjective

Origin of JASPER

Middle English jaspre, from Anglo-French jaspre, jaspe, from Latin jaspis, from Greek iaspis, of Semitic origin; akin to Hebrew yāshĕpheh jasper
First Known Use: 14th century

Rhymes with JASPER


noun    (Concise Encyclopedia)

Opaque, fine-grained or dense variety of the silica mineral chert that exhibits various colours, but chiefly brick red to brownish red. Long used for jewelry and ornamentation, it has a dull lustre but takes a fine polish; its physical properties are those of quartz. Jasper is common and widely distributed, occurring in the Ural Mountains, North Africa, Sicily, Germany, and elsewhere. For thousands of years, black jasper was used to test gold-silver alloys for their gold content. Rubbing the alloys on the stone, called a touchstone, produces a streak the colour of which determines the gold content within 1 part in 100.


Next Word in the Dictionary: jasper bar
Previous Word in the Dictionary: jaspé
All Words Near: jasper

Seen & Heard

What made you want to look up jasper? Please tell us where you read or heard it (including the quote, if possible).