Natural Gemstones

audiobook

Natural Gemstones

by Geological Survey (U.S.)

EN·~25 minutes·18 chapters

Chapters

18 total

Natural gemstones

1:09

Geologic environment

0:55

Gemstones occur in most major geologic environments.

1:15

Mineral gemstones

5:40

Birthstones

0:46

Organic gemstones

2:23

Buyer beware

0:22

Since 1935, the mining of gemstones in the United States has been almost entirely a recreational activity of mineral collectors and hobbyists.

1:20

The 1990 U.S. output of natural gemstones was primarily from Tennessee, California, Arizona, Arkansas, Montana, Nevada, and Maine.

0:26

Gemstones: Value of U.S. production vs. imports, 1986 and 1989

0:46

Description

In this engaging guide, listeners discover the fascinating world of natural gemstones, from the glittering diamonds and sapphires to the more modest yet beautiful semi‑precious stones. The narration walks you through what makes a gem precious—its beauty, durability, and rarity—while explaining the basic science of minerals, gemologists, and lapidaries. You'll learn how gemstones form in diverse geological settings such as pegmatites, stream gravels, and metamorphic rocks, and why they are often scattered in tiny pockets rather than large veins.

The program also dives into the practical side of gem hunting, describing how collectors locate and identify stones in riverbeds and outcrops across the United States. Detailed discussions of hardness, specific gravity, and the Mohs scale give listeners the tools to evaluate a gem’s quality, while vivid descriptions of classic mineral groups—beryl, chrysoberyl, corundum, and more—bring each crystal to life. Whether you’re a seasoned lapidary or a curious newcomer, the audio journey equips you with a solid foundation to appreciate the science and beauty behind every sparkle.

Collections

Browse all

Details

Language

en

Duration

~25 minutes (24K characters)

Publisher of text edition

Project Gutenberg

Credits

Produced by Stephen Hutcheson, Dave Morgan, Carol Spears and the Online Distributed Proofreading Team at http://www.pgdp.net

Release date

2015-01-16

Rights

Public domain in the USA.

About the author

GS

Geological Survey (U.S.)

A scientific agency rather than an individual author, this name represents the U.S. Geological Survey, the federal organization behind generations of maps, earth science reports, and research on natural hazards and resources. Its publications are shaped by a long mission to help people understand the land, water, ecosystems, and geology of the United States.

View all books

You may also like