RoamGem Studio is a pocket workbench for hobby lapidaries. Set up a stone in seconds — pick a mineral from the catalog, choose a cut shape, log rough and target weights, then walk it through the full workflow from sawing to polish. The on-bench timer captures every focused session, and the workflow chips let you jump between coarse grind, fine sanding, prepolish and polish without losing context. Insights roll up your hours by day, by phase and by material, and convert them into studio value at your own rate. The Recipes tab is a built-in reference for 21 popular gem materials with Mohs hardness, heat-risk hints and grit guidance, plus on-tap Wikipedia summaries when you want to dig deeper. No accounts, no cloud — your stones live entirely on your iPhone.