Luna Marchetti
Creator of Stone Snap · Rock Collector · Geology Enthusiast
Luna has been collecting rocks since she could walk. Shoe boxes full of quartz. Pockets full of gravel her parents didn't appreciate. A college geology textbook that fell apart from overuse.
After years of hauling field guides on hikes and getting vague results from general-purpose image search tools, she decided to build something better. Stone Snap was born from that frustration: a dedicated AI rock identifier that actually understands geology.
Background
Luna studied geology and environmental science, spending years in the field identifying specimens the old-fashioned way: hand lens, streak plate, hardness tests, and heavy reference books. She collected over 800 specimens from trails, riverbeds, and road cuts across the country.
When large language models with vision capabilities became available through Google's Gemini AI, she saw the opportunity to build the tool she always wanted: point your phone at a rock and get a real geological breakdown. Not a Wikipedia link. Not "this might be a mineral." Actual data — chemical composition, Mohs hardness, crystal system, formation environment, and industrial uses.
She built Stone Snap as an Android app, added Rocky the AI chat assistant for follow-up questions, created a learning hub with quizzes and flashcards, and included a kid mode so young explorers could use it too. The app launched on Google Play in 2026.
Areas of Expertise
Geology & Mineralogy
Rock and mineral identification, crystal systems, Mohs hardness testing, streak analysis, and field classification of igneous, sedimentary, and metamorphic specimens.
AI & Computer Vision
Applied machine learning for geological image analysis, Google Gemini AI integration, and building AI-powered tools that make expert knowledge accessible to everyone.
Science Education
Designing interactive learning experiences for geology — quizzes, flashcards, XP systems, and kid-friendly content that turns rock identification into a game.
Android Development
Jetpack Compose, Material Design 3, Room database, Firebase, and building production Android apps from concept to Play Store release.
"I just wanted an app that could do what my geology professor did — look at a rock and rattle off everything about it."
— Luna Marchetti, Creator of Stone Snap
Luna's Collection
847
Specimens
15+
Years Collecting
23
States Explored
1
App Built
Try the App Luna Built
Free to download. 5 free identifications. Powered by Google Gemini AI.
Download Stone Snap Free