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The Geotoolbox

Small, focused tools for structural geology, mineralogy, geochemistry, hydrology, and optical mineralogy — the kind of thing you'd otherwise open five different apps for. Everything runs client-side; nothing you enter leaves your browser.

1Live tools
12Planned
5Disciplines

Structural Geology

3 tools
Stereonet PlotterLive
Plot strike/dip as poles and great circles on an equal-area or equal-angle stereonet. In-browser Python
Apparent ↔ True DipLive
Convert between apparent dip on a section and true dip of a plane. In-browser Python
Fold Vergence IdentifierLive
Determine vergence direction from bedding and axial-plane orientation. In-browser Python

Mineralogy

2 tools
Mohs Hardness ExplorerLive
Interactive scratch-test scale from talc to diamond, with reference minerals. In-browser Python
Crystal System IdentifierLive
Step through symmetry to identify one of the seven crystal systems. In-browser Python

Geochemistry

3 tools
QFL Ternary DiagramLive
Classify sandstones by quartz–feldspar–lithic composition. In-browser Python
Harker Diagram PlotterLive
Plot major-oxide variation diagrams against SiO₂ for a rock suite. In-browser Python
CIPW Norm CalculatorLive
Convert whole-rock oxide analyses into normative mineralogy. In-browser Python

Hydrology

2 tools
Piper Diagram GeneratorSoon
Classify groundwater facies from major-ion chemistry. In-browser Python
Groundwater Quality IndexSoon
Compute a weighted GWQI from standard water-quality parameters. In-browser Python

Optical Mineralogy

2 tools
Michel-Lévy Interference ChartSoon
Read birefringence and thickness off the classic interference-colour chart. In-browser Python
Birefringence CalculatorSoon
Compute Δ from indicated refractive indices, or solve for the missing value. In-browser Python
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