The firikyiwa is a percussion instrument of West Africa, traditionally used by the Ashanti and Akan people.

Origin: southern Ghana, time unknown
Aliases: afirikyiwa, sikyifirikyiwa, dondondo
Description: Two curved hollow iron cup-like structures whose tips touch each other with some empty space in the middle, and an iron ring.
Usage/History: Index finger inserted in the space between the cups and ring worn on the thumb of the same hand. Bringing the thumb and index together causes a hollow ringing sound. Musically used as a timekeeping instrument, mainly played by women. Variously described as a castanet and a bell.

Related instruments:
Krakebs (https://musicbrainz.org/instrument/1bb67401-1501-4259-803a-c7c8e45c7624)

Sources:
https://omeka1.grinnell.edu/MusicalInstruments/items/show/364
https://motherlandmusic.com/products/instruments/bells/firikyiwa/firikyiwa/
http://music.africamuseum.be/instruments/english/ghana/ashanti/dondondo.html
Image links: https://omeka1.grinnell.edu/MusicalInstruments/files/original/eb88981984d7b49f7b2da510d2b08017.jpg
http://music.africamuseum.be/instruments/pic/ghana/ashanti/fienga7.jpg