Pocket Genius: Rocks and Minerals – A Compact Guide to the Earth’s Treasures

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Using your digital guide, here are the most sought-after specimens currently trending in the rockhounding community.

| | Rock | |-------------|-----------| | Naturally occurring, inorganic solid | Mixture of two or more minerals | | Definite chemical formula | No single formula | | Crystalline structure (e.g., quartz, feldspar) | Examples: granite, sandstone, marble |

A rock’s external color lies. Hematite can look silver or black, but its streak (powdered color) is always red. The Pocket Genius PDF has a specific "Streak" filter on pages 40-50. Search for the color of the powder you left on the back of a ceramic tile.

First, let's break down the source material. Published by DK (Dorling Kindersley), Pocket Genius: Rocks and Minerals is a compact, 160-page visual encyclopedia. Unlike dense geological textbooks, this pocket guide is designed for agility.