By Daniel & Sebin · rockysd.fr

Discover the world of
rocks & crystals.

We teach kids about rocks, crystals, fossils, and how the Earth is built — one stone at a time.

Start exploring Play a game
⬡ Sedimentary ⬡ Magmatic ⬡ Metamorphic
Rock types
Three families of rock
Every rock on Earth belongs to one of these three groups.
🏔️
Sedimentary
Layers of sand and mud pressed together over millions of years.
🌋
Magmatic
Born from fire — formed when lava or magma cools down.
💎
Metamorphic
Transformed by heat and pressure deep inside the Earth.
Learn about rocks →
Crystal Corner
Crystal Corner
Discover the magic of crystals!
🔮
Quartz
The most common mineral on Earth — clear and beautiful
💜
Amethyst
Purple quartz used as a gemstone since ancient times
✨
Pyrite
Shiny golden mineral — "Fool's Gold"!
See all crystals →
Fossils Corner
Fossils Corner
Traces of ancient life — frozen in stone forever.
🐚
Ammonite
Ancient sea creature — lived 66 million years ago!
🍃
Leaf Fossil
Plants preserved in rock — a window into ancient forests
🦴
Dinosaur Bone
Real bones turned to stone over millions of years
Explore fossils →
Fun & Games
Play and learn
Games designed to make rock knowledge stick.
🪨
Which rock are you?
Answer fun questions and discover your inner mineral.
Quiz
🃏
Match game
Flip cards and match rocks to their names!
Memory
🔍
Guess the rock
We show you a photo, you guess the rock type.
Challenge
🏆
Scoreboard
See how you rank against other rock explorers!
Leaderboard