Contemporary jewelry has expanded its field of action by incorporating alternative materials and production processes, fostering critical, sustainable, and culturally relevant approaches. Within this context, biojewelry—especially those based on local resources—stands out as a means of promoting identity, sustainability, and social engagement. This study investigates the ornamental potential of the flora present in the Federal University of Juiz de Fora Botanical Garden (JB-UFJF), with the aim of developing territory-based jewelry pieces that enhance the relationship between local resources, cultural heritage, and sustainable design practices. The research employed an action-research methodology, involving undergraduate students from the Jewelry and Accessories Design course at UFJF, who were challenged to create adornments from natural materials collected in the Botanical Garden. The study was carried out in four stages: preliminary site visit, authorization for collection, collection activity with students, and the creative development of biojewels. Throughout the process, the students experimented with native seeds, pods, leaves, flowers, and other organic materials, applying design methods to create prototypes while respecting the characteristics and symbolism of local culture. The results demonstrated that the Botanical Garden’s flora offers significant ornamental potential and that the use of local organic resources can serve as a valuable strategy for sustainable and culturally engaged jewelry design. The experiment promoted a closer connection between students and the regional environment, reinforcing the educational and social roles of design. Moreover, it contributed to reflections on production cycles, local biodiversity, and the valorization of territorial identity through creative processes. In conclusion, the project highlights biojewelry as an effective path to expand sustainable practices, integrating local resources, environmental care, cultural appreciation, and conscious consumption.