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Ilvaite
Ilvaite

Locality: Rio Marina, Elba Island, Livorno Province, Tuscany, Italy Field of View: 14 mm Formula: CaFe 2+ 2 Fe 3+   (Si   2 ...

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Amazing Gehlenite
Amazing Gehlenite

Locality: Caspar quarry, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany FOV 3 mm. Collection Bernd Ternes, p...

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Fluorite - fluorescent
Fluorite - fluorescent

Fluorite - fluorescent Rogerley Mine Frosterley Country Durham United Kingdom Size: 9.5 x 7.3 x 4.5 cm Photo Copyright © SpiriferMiner...

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Anticlines and Synclines
Anticlines and Synclines

This photo taken on U.S. 48 near Walnut Bottom, West Virginia, is an example of both anticlines and synclines in the same formation. Ant...

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Excellent intensive blue Haüyne with Sanidine Crystals
Excellent intensive blue Haüyne with Sanidine Crystals

Excellent intensive blue and gemmy crystals of haüyne in a vug of a sanidinite ejection block. Haüyne Formula: Na 3 Ca(Si 3 Al 3 )O 1...

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What is Bowen's Reaction Series?
What is Bowen's Reaction Series?

Back in the early 1900's, N. L. Bowen and others at the Geophysical Laboratories in Washington D.C. began experimental studies into the...

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Rhodochrosite, Hubnerite, Tetrahedrite, and Needle Quartz
Rhodochrosite, Hubnerite, Tetrahedrite, and Needle Quartz

Rhodochrosite, Hubnerite, Tetrahedrite, and Needle Quartz Hedgehog Pocket, Main Stope Drift, Sweet Home Mine, Alma, Colorado Photo Cop...

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Download The General Dictionary of Geology
Download The General Dictionary of Geology

Edited by : Alva Kurniawan Department of Environmental Geography, Gadjah Mada University, Yogyakarta, Indonesia and : John Mc. Ken...

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Why does Earth have deserts?
Why does Earth have deserts?

Hadley Cell scheme (Credit: ClimateTheory) Take a look at a physical map of the world. Thirty degrees on either side of the equat...

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 Huge earth crack opened up in Sonora, Mexico
Huge earth crack opened up in Sonora, Mexico

A one-kilometer long earth crack opened up on August 15, 2014, in Sonora, Mexico. The crack severed Highway 26 between the city of Herm...

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Why Geologists Love Beer?
Why Geologists Love Beer?

Fact: Geologists love beer. There is abundant proof of this here at the American Geophysical Union meeting, the largest collection of e...

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How does Bowen's Reaction Series affect chemical weathering?
How does Bowen's Reaction Series affect chemical weathering?

In general, minerals are most stable at the temperature and pressure at which they form. In the case of the igneous rock minerals descr...

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10 Pictures that will make you want to become a Geologist
10 Pictures that will make you want to become a Geologist

Mt. Head, Canada Geology is a magnificent and unique science. What makes it so unique, you may rightly ask; well, a good geologist has ...

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How Plate Tectonics Works?
How Plate Tectonics Works?

1. There are two basic types of LITHOSPHERE: continental and oceanic. CONTINENTAL lithosphere has a low density because it is made of relat...

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How to study and  identify the Minerals samples?
How to study and identify the Minerals samples?

            In simple terms, our planet is just a big ball of very hot stuff which, at the surface where it is exposed to space, has coole...

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What is the difference between Quartz and white Feldspar in Rocks?
What is the difference between Quartz and white Feldspar in Rocks?

Feldspar grows (when allowed to) into rectangular crystals, and then usually breaks the same way. This breakage pattern is called cle...

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Iridescent Pyrite
Iridescent Pyrite

  Iridescent Pyrite Location: Shangbao Mine, Leiyang Co., Hengyang Pref., Hunan Province, China Size: 1.9" x 1.8...

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Gorgeous Agate, Morocco.
Gorgeous Agate, Morocco.

Kerrouchene Khenifra Province Morocco Size: 8x6.4x4.6 cm Weight: 270 g Description: Aesthetic, colorful agate from Morocco, p...

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 Indicolite Tourmaline with a large pink Lepidolite
Indicolite Tourmaline with a large pink Lepidolite

Gorgeous specimen of blue Indicolite Tourmaline with a large pink Lepidolite crystal to its right and a smaller Quartz crystal to its lef...

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What is the difference between phaneritic and Aphanitic Rocks ?
What is the difference between phaneritic and Aphanitic Rocks ?

COARSE GRAINED TEXTURE (PHANERITIC) , mineral grains easily visible (grains several mm in size or larger) Phaneritic textured rocks a...

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 Amazing Blue Sapphire
Amazing Blue Sapphire

Today's Luxury eye Candy is just awesome, it's this Blue Sapphire weighing 72.9 cts from Graves Hill, Australia! Sapphire is...

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Epidote, quartz
Epidote, quartz

Imilchil Er Rachidia Province Morocco Size: 7.8x5x3.8 cm Weight: 131 g Description: Great, aesthetic specimen of green epido...

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How can a volcano erupt mafic lava one time, and then felsic lava another time?
How can a volcano erupt mafic lava one time, and then felsic lava another time?

There are several ways, but one of the common ones happens when the magma in a magma chamber has time to separate (called "differen...

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Incredible spray of Azurite crystals with ps to Malachite
Incredible spray of Azurite crystals with ps to Malachite

Incredible specimen featuring a dramatic spray of Azurite crystals with ps to Malachite! For a miniature sized specimen, this piece...

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What causes the plates tectonic to move?
What causes the plates tectonic to move?

Let's play with some numbers. Assume that average continental crust weighs in at about 10 cubic feet to the ton. If a ton equals ...

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How does Bowen's Reaction Series relate to the classification of igneous rock?
How does Bowen's Reaction Series relate to the classification of igneous rock?

 Bowen's Reaction Series describes the temperatures at which different common silicate minerals change from the liquid to solid pha...

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What are the most important types of rock in the crust?
What are the most important types of rock in the crust?

     Basalt and granite actually have quite a bit in common. Both are igneous rocks, which means that they cooled from a magma (the eart...

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Topaz, Zacatecas, Mexico
Topaz, Zacatecas, Mexico

Topaz Locality: Mina Veronica, El Copetillo, Mun. de Villa García, Zacatecas, Mexico FOV=2 cm Photo Copyright © Tony Peterson

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