Rock Identifier Blog
Practical guides, fun geology facts, and everything you need to start identifying rocks like a pro.
How to Identify Rocks: A Beginner's Complete Guide
Learn how to identify rocks at home using simple tests for color, luster, hardness, streak, and more. A practical beginner's guide to rock identification.
Read more →15 Most Common Rocks You'll Find in Your Backyard (And How to Identify Them)
Discover the 15 most common rocks found in backyards across North America. Learn what granite, quartz, limestone, and more look like, and how to tell them apart.
Read more →Quartz vs Glass: How to Tell the Difference (5 Easy Tests)
Not sure if that clear rock is quartz or just glass? Here are 5 simple hands-on tests you can do right now to tell quartz from glass. No geology degree required.
Read more →How to Tell If a Rock Is a Meteorite: 7 Tests You Can Do at Home
Found a strange heavy rock? Learn the 7 key tests to determine if your rock is a real meteorite, from the magnet test to fusion crust identification.
Read more →Crystal Identification Guide: How to Identify Any Crystal
Learn how to identify crystals using shape, color, hardness, luster, streak, and special properties. Covers the 10 most common crystals with a step-by-step identification process.
Read more →Sedimentary vs Igneous vs Metamorphic: How to Tell the 3 Rock Types Apart
The complete guide to the three types of rocks. Learn how sedimentary, igneous, and metamorphic rocks form, what they look like, and how to identify each type in the field.
Read more →How to Find and Identify Geodes: The Complete Guide
Everything you need to know about finding geodes in the wild. Learn where to look, how to identify them by shape, weight, and sound, plus how to crack them open safely.
Read more →Fool's Gold vs Real Gold: 8 Easy Ways to Tell the Difference
Is that shiny yellow rock gold or pyrite? Learn 8 simple tests to tell fool's gold from real gold, including the streak test, hardness test, and malleability test.
Read more →How to Start a Rock Collection: Beginner's Guide
Everything you need to know to start rock collecting. From essential equipment and where to find rocks, to organizing, identifying, and displaying your collection.
Read more →Gemstone Identification: A Complete Visual Guide
Learn how to identify gemstones with this visual guide covering diamonds, rubies, sapphires, emeralds, and popular semi-precious gems. Includes real vs fake tips.
Read more →Beach Rock Identification: What You Find at the Shore
Identify the rocks you find at the beach. Covers quartz, granite, basalt, agates, sea glass, fossils, and more — plus tips for the best beach rock hunting.
Read more →Agate Hunting: Where to Find and How to Identify Agates
The complete guide to finding and identifying agates. Learn where to hunt, how to spot agates in the field, types of agates, and tips for cutting and polishing.
Read more →Obsidian Identification: How to Tell If a Rock Is Obsidian
Learn how to identify obsidian with this complete guide. Covers glassy luster, conchoidal fracture, sharp edges, color variations, and where to find obsidian in the wild.
Read more →Mohs Hardness Scale: The Complete Guide to Testing Rock Hardness
Master the Mohs hardness scale with this practical guide. Learn how to test mineral hardness at home using simple tools like pennies, glass, and knives to identify rocks.
Read more →Fossil Identification for Beginners: How to Find and Identify Fossils
Learn how to identify fossils with this beginner-friendly guide. Covers common fossil types, where to find them, how to spot them in the field, and real vs fake fossils.
Read more →How to Polish Rocks: The Complete Rock Tumbling Guide
Everything you need to know about polishing rocks at home. Covers rock tumblers, the 4-stage tumbling process, best rocks for tumbling, and hand-polishing techniques.
Read more →Rare Rocks Worth Money: A Guide to Valuable Rocks and Minerals
Discover which rocks and minerals are worth money. Learn how to identify valuable specimens including gold, diamonds, opals, jade, and rare gemstones you might actually find.
Read more →Petrified Wood Identification: How to Identify Petrified Wood
Learn how to identify petrified wood with this complete guide. Covers key identification tests, where to find it, types of petrified wood, and collecting regulations.
Read more →Sandstone vs Limestone: How to Tell the Difference
Learn how to distinguish sandstone from limestone using the acid test, texture, hardness, and fossils. Complete guide to identifying these common sedimentary rocks.
Read more →Fluorescent Minerals: The Complete Guide to Rocks That Glow Under UV Light
Discover the fascinating world of fluorescent minerals. Learn which rocks glow under UV light, why fluorescence occurs, and how to find glowing minerals in the wild.
Read more →Arrowhead Identification: How to Find and Identify Real Arrowheads
Learn how to identify authentic arrowheads and projectile points. Covers flaking patterns, symmetry, materials, where to find them, and legal collecting guidelines.
Read more →Jade Identification: How to Tell If a Rock Is Real Jade
Learn how to identify real jade with 7 simple tests. Covers jadeite vs nephrite, common jade imposters, where to find jade, and how much jade is worth.
Read more →Turquoise Identification: How to Tell If Turquoise Is Real
Learn how to identify real turquoise with 8 simple tests. Covers natural vs stabilized vs fake, common imposters like dyed howlite, famous mines, and what turquoise is worth.
Read more →How to Identify Rocks by Color: A Visual Guide to Every Rock Color
Use color as your starting point to identify rocks and minerals. This visual guide covers white, black, red, green, blue, purple, yellow, and brown rocks with quick identification tests.
Read more →Amethyst Identification: How to Tell If Amethyst Is Real
Learn how to identify real amethyst with 7 simple tests. Covers color zoning, hardness, common imposters like glass and dyed quartz, where to find amethyst, and grading.
Read more →Opal Identification: How to Tell If an Opal Is Real
Learn how to identify real opal with 8 key tests. Covers black opal vs white opal vs fire opal, synthetic vs natural, play of color, doublets and triplets, where to find opals, and grading.
Read more →Rose Quartz Identification: How to Tell If Rose Quartz Is Real
Learn how to identify real rose quartz with 7 simple tests. Covers color, hardness, cloudiness, common fakes like dyed glass, star rose quartz, where to find it, and what it's worth.
Read more →