Source: Standard literature
Bō-koḷa literally means "bō-leaf" is the Sinhalese term for a decorative motif that resembles a heart or an ace of spades.1
They often appear in Sinhalese lacquer work at the end of patura, long elongated triangles.
Bō-koḷa lacquer work decoration on the shaft of a Sinhalese patisthānaya.
They are the heart shaped forms on the far right, at the ends of elongated triangles called patura.
Sold by Mandarin Mansion in 2019.
Article: Sinhalese lacquer work
1. See Ananda K. Coomaraswamy; Medieaval Sinhalese Art, Pantheon Books, New York, Second Edition of the 1908 original, 1956. Page 216-217.