The Secret Life of Crystals
Go beyond the sparkle to understand how the Earth builds its most beautiful treasures. Learn to identify gems, understand their geometric secrets, and discover the extreme forces that forge diamonds.
Like Duolingo, but for The Secret Life of Crystals. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
A short one: 10 levels across 2 sections, about 20 minutes end to end, roughly 4 days at five minutes a day. It moves through Reading the Stones and The Earth's Pressure Cooker. It starts from scratch.
Free forever · No credit card · iPhone & Android
Key ideas in The Secret Life of Crystals
- Hardness is a ranking of resistance to scratching, not resistance to breaking
- Luster is the quality of light reflection, not the color of the stone
- A material can only leave a physical groove in something softer than itself
- Metallic minerals look like solid metal, while non-metallic minerals can look like glass, wax, or dirt
- Common objects like fingernails and steel nails serve as fixed reference points for hardness
- Surface texture determines if light bounces off sharply or scatters softly
- Applying the concept of relative hardness to identify a mystery mineral
- Categorizing minerals by how their surface reflects light
- Crystal habit is the 'default' shape a mineral wants to grow into
- Cleavage occurs because of internal 'fault lines' or weak bonds in the crystal structure
- Perfect geometric shapes only form when the mineral has enough space and time to grow without being crowded
- A cleavage plane will be flat and often repeat in parallel layers
- Distinguishing between a random break and a cleavage plane
- Specific gravity is essentially how 'dense' or 'heavy for its size' a mineral is
- Crystal habit represents the ideal growth form
- Lifting a mineral (the 'heft test') is a quick way to estimate specific gravity
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives The Secret Life of Crystals the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
When a geologist talks about a mineral's 'luster,' what are they actually looking at?
Get it right to open this lesson and 9 more in the app.
Where The Secret Life of Crystals takes you
- 1
Reading the Stones
- Spotting the Real Deal
- The Geometry of Growth
- 2
The Earth's Pressure Cooker
- Diamonds and the Deep Earth
- The Chemistry of Color
2 sections · 4 units · 10 levels. Built to play, not to enroll.
You pick the voice
The Secret Life of Crystals is taught in the The Bestie style: your friend who just gets it. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start The Secret Life of Crystals today.
Download Tomo, search The Secret Life of Crystals, and play your first lesson in under a minute.