prase

[preyz] /preɪz/
noun, Mineralogy
1.
a leek-green cryptocrystalline variety of chalcedony.
Origin
1350-1400; < French < Latin prasius leek-green stone < Greek prásios leek-green, derivative of práson leek; replacing Middle English prassius < Latin, as above
British Dictionary definitions for prase

prase

/preɪz/
noun
1.
a light green translucent variety of chalcedony
Word Origin
C14: from French, from Latin prasius a leek-green stone, from Greek prasios, from prason a leek