Solved cryptogram
A mineral has one fixed recipe and a repeating crystal structure. A rock is usually a mix.
Earth Science Facts, sourced to U.S. National Park Service.
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What it means
Quartz is a mineral: silicon and oxygen in a set ratio, in a set arrangement, wherever you find it. Granite is a rock, and the sparkle in a countertop is quartz and feldspar and mica sitting side by side, each with its own recipe. That distinction is why a mineral gets a hardness and a chemical formula while a rock gets a description, and why the same mineral turns up in rocks that formed in completely different ways.
The claim comes from U.S. National Park Service.
- SourceU.S. National Park Service
- CollectionEarth Science Facts
- Difficultymedium
- Length72 letters, 20 unique
Nearby in the collection
The facts either side of this one.
About as hard as this one
Scored closest to it by the model behind our guide to solving cryptograms.