marekanite

English

Noun

marekanite (countable and uncountable, plural marekanites)

1. An Apache tear (obsidian nodule).
   • 1899, The Quarterly Journal of the Chemical Society of London, page 38:

     Marekanite balls from Corinto in Nicaragua are described; they are about the size of hazel-nuts, and black, with vitreous lustre.

   • 2010, M. Steven Shackley, X-Ray Fluorescence Spectrometry (XRF) in Geoarchaeology, Springer Science & Business Media, →ISBN, page 219:

     Marekanites are often found as embedded remnants within perlite.

2. The material which such nodules consist of.
   • 1897, Papers and Proceedings of the Royal Society of Tasmania, page 43:

     But the nature of marekanite is now well understood. It is the perlitic or subpumiceous modification of a glassy rhyolitic rock in situ on […]