Source: First hand period account
Gal-mita pike literally means "stone handled knife". It was a term that according to Parker (1909) was used for a group of fancy Sinhalese knives, regardless of the materials of their hilts.1
For a further classification, see: Pihiya kättha.
A royal stone-handled Kandyan knife. Rock chrystal hilt, mounted in gold. Taken in 1764.
Rijksmuseum accession number: NG-NM-7114
A large pihiya kättha with ivory grip.
1. H. Parker, Ancient Ceylon. Luzac & Co, London, 1909. Page 531.