aegyptilla
noun
ae·gyp·til·la
ˌē-jəp-ˈti-lə
plural -s
: a gem produced from a 2-layered agate usually cut so that one color is encircled by the other
Word History
Etymology
Latin, a gem formerly found in Egypt, from Aegyptus Egypt + Latin -illa, diminutive suffix
First Known Use
1822, in the meaning defined above