Iridescence and Labradorescence in Rocks and Fossils
Iridescent Rocks and Fossils Rainbows aren't just confined to the sky -- they can happen right here on Earth too! When you tilt a rock or fossil in the light and...
Geology Unearthed
Concretions
Nature's Time Capsules: What Are Geologic Concretions? Have you ever been strolling a shoreline or wandering in the desert and spotted a rock that looked like a cannonball, a perfect...
Pseudomorphs and Pseudofossils
Geologic Tricksters: Pseudomorphs and Pseudofossils In the world of geology, things may not always be what they seem.... If you've ever come across a rock that looks exactly like a...
Metamorphic Rocks
Rocks are categorized into three classes based upon their origin: Igneous rocks, Sedimentary rocks, and Metamorphic rocks. Each type is classified by its texture, structure, and the minerals it contains....
Sedimentary Rocks
Rocks are categorized into three classes based upon their origin: Igneous rocks, Sedimentary rocks, and Metamorphic rocks. Each type is classified by its texture, structure, and the minerals it contains....
Igneous Rocks
Rocks are categorized into three classes based upon their origin: Igneous rocks, Sedimentary rocks, and Metamorphic rocks. Each type is classified by its texture, structure, and the minerals it contains....
Mohs Hardness
If you've ever heard a geologist or collector refer to a minerals "Hardness" and wondered what on Earth they were talking about, we have you covered! What is...
Why Do Minerals Fluoresce?
Let's explore the wonderful world of Fluorescent Minerals! These magical minerals (and fossils) appear to glow when exposed to ultraviolet (UV) light. Here you'll learn about different wavelengths of light,...
What is a Pegmatite?
Let's explore what pegmatites are, how they form, what kind of rocks are found in pegmatites, and what makes them so special! Giant Pink Tourmaline with Quartz on display at...
How Can the Same Type of Mineral Form Into Different Colors and Shapes?
Have you ever wondered how the same type of mineral can look so different from one specimen to another? A deep purple Amethyst crystal, a golden yellow Citrine, a dark...
Why Do Rocks Get Cut and Polished?
Unveiling the Secrets of Cut and Polished Rocks and Fossils Let's dive into the world of rock cutting and polishing, exploring why it's done, how it happens, and the purpose...
Metallic Minerals
We're diving deep into the fascinating world of metal minerals, the building blocks of everything from ancient tools to modern technology. We depend on these metals for most aspects of...
What is a Meteorite?
Space Rocks! We look at a LOT of different types of rocks here at Unearthed, but these are truly out of this world....literally! Meteorites are both fun to collect and...
Mineral Groups and Classifications
While you may be familiar with individual mineral names and be able to identify them based upon their general shape and color, there is another important classification of minerals based...
Petrified Wood
Everything you ever wanted to know about Petrified Wood! Have you ever seen a rock that looks strangely like wood? Maybe it has bark-like texture on the outside, or what appear to...
