Micronutrient deficiency is increasingly recognized as a major challenge to food and nutrition security, particularly in developing countries. There is a growing consensus on the importance of food-based approaches to address this issue. The broad genetic diversity present in plant genetic resources offers valuable opportunities to identify micronutrient-rich genotypes for direct consumption or for use in crop improvement through breeding strategies. For instance, zinc concentration in unpolished brown rice has been reported to range from 14.5 to 35.3 mg/kg (Maganti et al., 2020). Using X-ray fluorescence (XRF), we analyzed the nutritional composition of 700 accessions derived from minicore collections of Oryza glaberrima and Oryza sativa. Our results identified 75 zinc-rich rice accessions (37 O. glaberrima and 38 O. sativa). Zinc concentration in unpolished grains ranged from 30 to 39.5 mg/kg, with six accessions (3 O. glaberrima and 3 O. sativa) showing particularly high levels between 35 and 39.5 mg/kg.