plastic base with 4 brass terminals in a line. Each terminal is high up and has a large brass arm attached. One arm has a Morse code style tapper at the end and is poised over a plastic stand. Stamped in the corner of the base is "Univ. Abdn., Nat.…
Osidian core. One of a collection of 34 obsidian articles: 11 arrow/javelin heads, 12 knives, 6 cores, 5 scrapers. Found in many parts of Mexico in the neighbourhood of volcanoes.