tough shiny grey seed of a bonduc tree; used for making e.g. jewelry
A rounded seed, instead smaller compared to a nutmeg, having a difficult smooth layer, and a yellowish or bluish color. The seeds grow when you look at the prickly pods of tropical, woody climbers of genus Cæsalpinia. Cæsalpinia Bonduc has actually yellowish seeds; Cæsalpinia Bonducella, bluish grey.