# Igneous Rocks — IUGS system of classification

> IUGS system of classification (iPhone/iPad app by Steven Baumann.)

- Source: https://appshunter.io/ios/app/igneous-rocks/id6756393292 (this page in markdown: same URL + `.md`)
- Developer: [Steven Baumann](https://appshunter.io/developer/1859859436)
- Category: Education, Reference
- Price: $9.99
- Age rating: 4+
- Requires: iOS 15.1 · 68 MB
- Languages: American English
- Released: 2025-12-11
- Data updated: 2026-06-01
- User reviews in markdown: https://appshunter.io/ios/app/igneous-rocks/id6756393292/reviews.md

## What is Igneous Rocks?

This is not a point at a rock and get a failed ID app.  This igneous rock identifier classifies igneous rocks by you entering the mineral percent based on ternary plots (IUGS standard) for field and calculation use.  It is not an app for beginners.  Quartz, foids, and olivine are calculated automatically.  This calculates the rock name of most felsic, intermediate, mafic, and ultramafic rocks in a field setting.  There are 7 different diagrams, 2 basic information pages, and the user guide.


## Version history (last 2 releases)

### 1.3 — 2025-12-13

I have added ternary diagrams and more minerals.  I also changed the selection colors so the colors contrasted more. It is a serious upgrade.

### 1.0 — 2025-12-11

No release notes.

## More apps by Steven Baumann

- [Star Builder Stats](https://appshunter.io/ios/app/star-builder-stats/id6756286857)
- [Geo Trek Adventures](https://appshunter.io/ios/app/geo-trek-adventures/id6756508068)
- [Simple Geo Camera](https://appshunter.io/ios/app/simple-geo-camera/id6756550817)
- [Quadrant Stereonet Plotter](https://appshunter.io/ios/app/quadrant-stereonet-plotter/id6757939755)
- [VinlandNorseCalendar](https://appshunter.io/ios/app/vinlandnorsecalendar/id6759581969)

All apps by Steven Baumann: https://appshunter.io/developer/1859859436

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*