192 results for mexico

After Quartz, Calcite is the most next common mineral on the face of the Earth. Calcite comprises about 4% by weight of the Earth's crust. It is found throughout the world in sedimentary, metamo ...

Rainbow Obsidian is black, but when rotated in light it shows flashes of rainbow colors! Rainbow Obsidian comes from the La Revoltosa Mine, San Andreas, Mun. de Magdalena, Jalisco, in Mexico. Ob ...

Rhyolite is an extrusive igneous rock formed as a deposit of volcanic ash. The ash becomes rock after being exposed to extreme heat and pressure. Iron oxide stains create the beautiful patterns.&n ...

Silver Sheen Obsidian or Gold Sheen Obsidian are chatoyant stones. When the semiprecious stone material is held in bright light it has a flash of sparkling silver or gold colored chatoyance or lig ...

Snowflake Obsidian is a black obsidian with whitish-gray spots of radiating needle-shaped cristobalite crystals. A lot of Snowflake Obsidian is from Millard County, Utah. Approximately 2 ...

Rhodochrosite is a gorgeous gemmy pink stone mostly from Argentina. Rhodochrosite actually formed in the Inca silver mines after they were abandoned in the thirteenth century. These magnificent pi ...

Septarian Nodules are actually sedimentary rock concretions. They actually look like giant mud balls, but when you break them open they have very pretty pockets of yellow. Some even have open pock ...

Obsidian is a natural volcanic glass. It is actually not a mineral, but a mineraloid.  This glassy, lustrous mineral is found in lava flows. Obsidian is produced when lava cools very quickly. T ...

Mahogany Obsidian is semiprecious stone that is a deep black with blood red streaks. The red coloration is likely the result of trapped hematite or iron. Mahogany Obsidian was probably named that ...

Pyrite is the classic "Fool's Gold". There are other shiny brassy yellow minerals, but Pyrite is by far the most common and the most often mistaken for gold. Whether it is the golden look or so ...

Imperial Jasper and Royal Imperial Jasper are dense, very fine grained and exceptionally hard jaspers. Both of them are highly prized porcelain jaspers. Because of their fine grain, porcelain ja ...

Laguna Agate comes from Northern Mexico and is known for its vibrant reds! The Laguna Agate area is in the state of Chihuahua, from the Estacion Ojo Laguna area, about 150 miles south of the U.S.- ...