Kaizen Gems

Use 24-hour time, e.g. 23:00 to 01:00 counts as 2h across midnight. Or just enter a Duration. Date defaults to today.

RI and dispersion for common materials match Gem Cut Studio, plus a few requested synthetics (YAG, GGG, GAGG). Birefringence, SG, hardness, optic character, crystal system, and pleochroism are from standard gemological references; individual stones vary by origin and treatment. Critical angle is computed from RI. Click a column to sort. Verify for critical work.

Your own reference for what lap/grit comes next, by material. Not a decreed "official" progression, just whatever you (or your team) document here so everyone can check the same source. Steps reuse the Stages and Grit/lap options from Settings. Export the library to share your shop's standard with others; import to adopt someone else's.

The steps of your cutting process. Give a stage grit / lap options and they'll appear as a dropdown when you track that stage.

Linking a backup file (Chrome or Edge on desktop) auto-saves every change to a real file on your computer — your data then survives clearing your browser. On other browsers, use Export regularly.

Automatic in-browser restore points (last 8 changes). Recover from an accidental edit or erase.

Optional for now. Creating an account is the first step toward syncing your data across devices. Your local backup file above keeps working independently either way.

Feedback opens your email app addressed to the developer, pre-filled with the version you're on.