Puzzle from 23 April 2026

Quartz

Quartz
THE ANSWER

"SideriteBresil2" — Photo by Didier Descouens / Wikimedia Commons / CC BY-SA 4.0

The silent engine powering our sense of time.

This common mineral is a primary component of sand and serves as a fundamental building block of the Earth's crust. Its incredible structural stability and electrical properties have made it indispensable in everything from decorative gemstones to the internal oscillators of modern timepieces.

Explanation

Did you know?

Because it is so abundant and chemically resistant, it is the primary reason why beach sand is almost entirely composed of this single mineral.

The 5 Clues
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It possesses the unique property of being piezoelectric, generating an electric charge when mechanical stress is applied.

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Early radio pioneers utilized a specific cut of this material to maintain precise broadcast frequencies.

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It is the second most abundant mineral in the Earth's continental crust, following feldspar.

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While it appears in many colors, the pure form of this hexagonal crystal is clear and glassy.

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Often found in jewelry or inside your wall clock, this hard mineral is famously difficult to scratch.

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