Rocks: Pictures of Igneous, Metamorphic and Sedimentary Rocks
Photographs and information for a large collection of igneous, metamorphic and sedimentary rocks. Geology.com
Igneous Rocks | Pictures of Intrusive and Extrusive Rock Types
What are Igneous Rocks? Igneous rocks are formed from the solidification of molten rock material. Some form below Earth's surface. Some form on or above Earth's surface. We describe these two …
Sedimentary Rocks | Pictures, Characteristics, Textures, Types
Home » Rocks » Sedimentary Rocks Pictures of Sedimentary Rocks Photos of Common Clastic, Chemical, and Organic Sedimentary Rock Types. Article by: Hobart M. King, PhD Breccia is a clastic …
Meteorite Identification: Have you found a space rock?
One of the most frequently visited sections of the site is a detailed guide to meteorite identification. As a result of that guide we receive, almost daily, inquiries by letter and email from hopeful individuals …
Mineral Properties, Photos, Uses and Descriptions
Serpentine - metamorphic rocks used in construction, architecture and lapidary work. Is Water a Mineral? Are Water and Ice Minerals? Comparing their properties with the definition of a mineral.
Streak Test for Minerals - using a porcelain streak plate
What is the Streak Test? The " streak test " is a method used to determine the color of a mineral in powdered form. The color of a mineral's powder is often a very important property for identifying the …
The "Acid Test" for Carbonate Minerals and Carbonate Rocks
The Acid Test on Rocks LIMESTONE, DOLOSTONE, AND MARBLE Some rocks contain carbonate minerals, and the acid test can be used to help identify them. Limestone is composed almost entirely …
Magnetite & Lodestone | Mineral Photos, Uses, Properties
Magnetite and Earth's Magnetic Field Tiny crystals of magnetite are present in many rocks. In the crystallization of an igneous rock, tiny crystals of magnetite form in the melt, and because they are …
The Most Difficult Rocks to Identify | Teaching Rock Identification
Home » Rocks » The Most Difficult Rocks to Identify The Most Difficult Rocks to Identify Specimens that will challenge the most experienced geologist! Article by: Hobart M. King, PhD "What kind of rock is …
Diorite: Igneous Rock - Pictures, Definition & More
Diorite is the name used for a group of coarse-grained igneous rocks with a composition between that of granite and basalt. It usually occurs as large intrusions, dikes, and sills within continental crust.