Dictionary.com
Thesaurus.com

danburite

American  
[dan-buh-rahyt] / ˈdæn bəˌraɪt /

noun

  1. a rare mineral, calcium borosilicate, CaB 2 Si 2 O 8 , occurring in pegmatite in yellow or colorless crystals resembling topaz.


Etymology

Origin of danburite

after Danbury, where it was discovered in 1839; see -ite 1