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GuessKinMinerals

Guess the mystery mineral! Each guess reveals its position in the Strunz classification tree.

Play Today's Challenge

How It Works

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Guess a Mineral

Type any mineral name. Choose from 150 minerals spanning gems, metals, crystals, and rocks.

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See the Tree

Each guess reveals the classification tree — showing how minerals relate through shared chemical structure.

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Find the Target

Use class clues to narrow down. Did you know ruby and sapphire are the same mineral? Can you find it in under 5 guesses?

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One Mineral Per Day

Every day at midnight UTC, a new mystery mineral is chosen — the same one for everyone around the world. You get 20 guesses to find it. Share your results with friends and compare scores!

Same mineral globallyResets at 00:00 UTCTrack your streaks

Game Modes

Multiple ways to test your knowledge

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Daily

One mineral per day. Same for everyone.

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Practice

Random mineral. Unlimited plays.

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Silicates

Silicate minerals — Earth's most common.

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Gems

Precious and semi-precious gemstones.

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Metals

Native metals and metallic minerals.

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Hard Mode

Tree is hidden. Only text clues.

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Stats

Track progress

Real Nickel-Strunz classification Data

GuessKin Minerals uses real Nickel-Strunz classification data. Every node in the tree is based on real classification data.

0 mineralsNickel-Strunz classificationWikipedia images

Share Your Score

Get a Wordle-style emoji grid to share with friends

💎 GuessKin Minerals 2026-03-05 4/20

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Free · No account needed · Works on mobile