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Geologic Reference Library
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Geologic Time Line
Don't know the Paleozoic from the Permian? When did the
dinosaurs roam? What was happening on the third rock 4500
million years ago? Find out here |
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Mineral
Library
Probably the largest mineralogical reference. with over
9,600 different minerals, varieties and synonyms listed,
along with their occurrences and locations. |
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Glossary
Alphabetical listings of rock, mineral, gem, and geologic
terms with their definitions for anyone interested in rocks
and lapidary. |
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Mineral Identification
Rock and mineral collectors use several physical property tests to help
identify an unknown mineral. Learn what they are and how to
use them. |
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Hardness Scales
Was Moh just one of the 3 Stooges? Learn about mineral
hardness, how it is used by rock collectors, and other
methods used to determine hardness. |
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Crystal Systems
How does this help an ordinary rockhound to identify
minerals? Understanding mineral symmetry is very helpful in
identifying crystals. |
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Periodic Table
An interactive periodic table with links to individual
elements properties, history, uses, sources and other useful
information. |
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Common Conversions
Conversions value and formulas found and used in lapidary
and rock literature, gemology, geology, and in the related
earth sciences. |
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Rocks in the News
Wonder what current rock, lapidary, gem, and geology related
stories are in the news? Learn what's up in the world of
rocks, gems and rock related science fields. |
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Cave and Karst Databases
Searchable databases for cave and sinkhole locations in the
US and countries around the world |
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Main Resource Center |
Getting Started Reference Center |
Technical Reference Center |
Shows, Clubs, & More |
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