Still Gold Rain
Forty precious metals, gems, ores and oddities, drawn and measured. Read each specimen like a geologist, test what you know in the Lab, and build a drawer of your own.
- Free
- Works fully offline
- No account
- iPhone & iPad
Four rooms, one atlas.
The same four pages that greet you on first launch. Swipe through them once, or replay the guide any time from Settings.
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Discover
A specimen for every day
Browse precious metals, gems, ores and oddities. Search by name, formula or property, and let Daily Discovery pick something new.
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Atlas
Read a specimen like a geologist
Every sheet gives the formula, hardness, density, lustre, streak, origin and where it is found, with the sources behind them.
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Lab
Compare, test and identify
Put three specimens side by side, turn crystal models, watch deposits form and solve identification cases from real data.
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Collection
Build your own drawer
Collect specimens, mark what you have studied, keep notes and earn small honours. Everything stays on this device.
Six tools, one set of numbers.
Every comparison, diagram and case uses the values of the atlas, so what you learn in one place holds everywhere else.
Compare Specimens
Up to three specimens side by side in one table.
Property Explorer
Hardness, density, lustre and more in plain words.
Crystal Structure
Turn crystal models and see how structure shapes properties.
Origin Explorer
Watch veins, magma, seas, rivers and pipes make minerals.
Identify the Specimen
Name the specimen from field clues, then read why.
Fact or Fiction
Thirty statements about minerals, each explained.
Turn a crystal in your hand
A crystal's outside shape follows the repeating arrangement of its atoms. Mineralogists group every arrangement into seven systems by the lengths and angles of three axes.
“Diamond and graphite are both made of pure carbon.”
Judge a statement to start your tally.
Ten rungs from talc to diamond
The scratch ladder every geologist learns. Each mineral scratches the ones below it. Tap a rung to open its sheet.
Ruby and sapphire share rung 9: both are corundum, crystalline aluminium oxide.
From gold dust to lightning glass.
40 specimens in five groups, each drawn from its own data: growth form, colours and lustre. Open any one to read its sheet.
Sources. Formulas, property ranges, localities and facts follow the Handbook of Mineralogy (Mineralogical Society of America), Mindat.org, the Webmineral database, the GIA Gem Encyclopedia, the USGS Mineral Commodity Summaries 2025, the Manual of Mineral Science and the Meteoritical Bulletin Database. Each sheet in the app lists the entries it used.
Small honours, no streaks.
Days never expire, so nothing demands a visit. Open any day you missed — there is no streak to keep.
- Fully offline
No network requests at all. The whole atlas lives inside the app.
- No account
Your profile, name and emblem live only on this device.
- No ads or tracking
No analytics and no third-party services. Nothing is uploaded.
- Your own pace
A Daily Discovery waits for you, and past days stay open.
Found a nugget worth adding?
A value that looks off, a mineral you would like in the atlas, or a question about the app — we read every note.
Thank you. We'll reply to the address you gave.
Let the gold rain settle.
Still Gold Rain is free on the App Store for iPhone and iPad. Open the atlas, pick today's discovery and start your drawer.
Download on theApp Store









