ˈzərˌkän, ˈzə̄ˌ-, ˈzəiˌ- sometimes -_kən noun
( -s )
Etymology: German zircon (now usually zirkon ), modification of French jargon jargoon, zircon, from Italian giargone
: a tetragonal mineral ZrSiO 4 consisting of a zirconium silicate and occurring usually in square prisms of adamantine luster and brown or grayish color (hardness 7.5, specific gravity usually about 4.7) — see hyacinth , starlite