Mosaic Immersion is a mixed-reality installation that reimagines the ancient practice of cairn stacking for the digital age. Within the augmented reality space, participants create and interact with virtual rocks featuring their unique hand movement scans, each embodying personal narratives. Inspired by the cultural significance of trail cairns as symbols of guidance and connection, the installation transforms rock stacking into a communal, contemplative virtual experience. Participants contribute to or observe a growing virtual cairn, exploring themes of resilience and human connection. This immersive journey blurs the boundaries between physical and virtual worlds, inviting reflection on shared experiences and collective memory in our increasingly digital world.