heronite
/ˈhɛrənʌɪt/Geology. Now rare
noun
A dark-coloured igneous rock of the phonolite group containing orthoclase, labradorite, aegirine, etc., in a matrix of analcime.
Origin
Late 19th century. From the name of HeronBay, a bay on Lake Superior, Ontario, Canada, where the mineral was first found + -ite.