High-Sulphidation Deposits of Gold
High-sulphidation deposits result from fluids (dominantly gases such as SO2, HF, HCl) channeled directly from a hot…
July 2014
Epithermal Systems: The Association of Gold Mineralization With Volcanic
The association of gold mineralization with volcanic and geothermal hot spring activity has long been recognized by prospec…
Green Balls of Conichalcite With Erythrite, Brown Olivenite
Green balls of conichalcite with erythrite, brown olivenite. Photo & Collection IOB Sylvano Green balls of conichalc…
The Difference Between Rocks and Minerals
A mineral is a solid formation that occurs naturally in the earth while a rock is a solid combination of more than one mi…
Fire Agate
Fire Agate , a variety of chalcedony, is a semi-precious natural gemstone found only in certain areas of northern Mexico an…
Petrophysics: The Study of Physical and Chemical Rock Properties
Petrophysics Is the study of physical and chemical rock properties and their interactions with fluids.A major applicat…
Amazing Rosette Linarite
Amazing Rosette Linarite. Photo Copyright © Czechmin.cz large group of linarite crystals growing in "limonite"…
Normal Faults in Road Cut Near Shoshone - California
Normal Faults in Road Cut Near Shoshone - California Normal, or Dip-slip, faults are inclined fractures where the blocks h…
Hydraulic Fracturing of Oil & Gas Wells Drilled in Shale
What is Hydraulic Fracturing? Hydraulic fracturing is a procedure that can increase the flow of oil or gas from a well.…
East Africa's Great Rift Valley: A Complex Rift System
East Africa's Great Rift Valley: A Complex Rift System The East African Rift System The East African Rift System (…
Native Sulfur atop Aragonite with Aragonite ps after Calcite!
Gemmy crystals of Native Sulfur atop Aragonite with Aragonite ps after Calcite! This is an impressive Sulfur specimen th…
Clinoclase
Clinoclase Crystals. Collection & Photo Matteo Chinellato A group of green dark Spangolite crystals and blue Conne…
The River of Five Colors
Caño Cristales is a Colombian river located in the Serrania de la Macarena province of Meta. The river is commonly called …
Unique Annabergite Crystals
Unique Annabergite Crystals. Photo Credit: © Jean-Marc Johannet Annabergite Annabergite is an arsenate miner…
Travertine Hot Springs at Pamukkale -Turkey
Pamukkale's terraces natural site in Denizli Province in southwestern Turkey are made of travertine, a sedimentary roc…
Amazing Carminite Crystals
Photo Copyright © Christian Rewitzer Carminite | #Geology Formula: PbFe 3+ 2 (AsO 4 ) 2 (OH) 2 System: Orthorhombic…
Volcano-powered Electricity, the Future of Alternative Energy
We could exploit energy from deep down in the earth, as a report from a geothermal borehole suggests. The project develope…
Clinoclase Crystals
Clinoclase Crystals. Photo Copyright © Elmar Lackner Clinoclase is a rare secondary copper mineral and forms acicula…
New Theory Suggests Gold Deposits Were Formed as a Result of Earthquakes
A new theory based on a simple but viable geologic model claims that over 80 percent of all commercial gold deposits …
Fossilized Gastropod Replaced by Precious Emerald
Formed from hydrothermal fluids in a shear zone interacting with the rock they passed through, the fossil in the host b…
Mono Lake Tufa
Lake Mono’s Tufas. Photo Credit: Tim Malabuyo The unusual rock formations that grace Mono Lake’s shores are known as tuf…
Largest Active Volcano on Earth shows Signs of Life
Recent swarms of tiny earthquakes inside Hawaii’s Mauna Loa signal that the volcano may be coming back to life. But don’t…
Gemmy Apatite Crystals
Credit: Spiriferminerals.com Cluster of lustrous, gemmy apatite crystals from a classic locality. Specimen mou…
The Significance of Fossils
Fossils are the preserved remains or traces of organisms that lived in the past. They are important because they provide evi…
.webp)