Posts Tagged ‘woo converted’

Kambaba Jasper / Stromatolites Kambaba Jasper, Stromatolites, colonial structures created by Cyanobacteria (commonly called blue-green algae) are among the oldest fossils on earth, being found in rocks over 3 billion years old. Once the dominant life form on the planet, Stromatolites are now found in only a few places, such as Madagascar. Cyanobacteria form these…

Jaspers Jasper is an opaque variety of chalcedony, which is a microcrystalline variety of the mineral Quartz. Opaque means that neither light nor images pass through. Microcrystalline quartz in its pure form is semitransparent. When a small amount of impurities or foreign materials are added to microcrystalline quartz, the color changes and its ability to…

Home Igneous Sedimentary Metamorphic Rock Cycle Minerals from Italy These mineral specimens are from our personal collection that we procured in Italy from an Italian Geologist Mineral dealer about 15 years ago. These minerals are all from Italy. Hand decorated WWII Italian White Marble Slab Ashtray from Siena, Italy $49.00 Read more Hematite Crystals from…

Hematite Hematite is an iron oxide mineral. Most iron ore deposits consist mainly of hematite, magnetite, or both. Hematite gets its name from the Greek word for blood (haimo) because of the color of its powder and the red streak it leaves when scratched across a piece of unglazed porcelain. Hematite is black, but when…

Gypsum/Selenite Gypsum is one of the most common, rock-forming minerals, developing thick beds formed by the evaporation of extremely salt laden waters. Gypsum is associated with halite and sulfur. It is deposited from lakes, seawater, hot springs, volcanic moisture, and sulfate solutions in underground veins. Anhydrite in underground veins can be converted into gypsum by…

Goldstone The History of Goldstone Goldstone is a type of glass made with copper or copper salts in the presence of a reducing flame. Under normal oxidative conditions, copper ions meld into the silica to produce transparent bluish-green glass; when the reduced goldstone melt cools, the copper remains in atomic isolation and precipitates into small…

Glacial Concretions Our Suppliers for these wonderful Glacial Concretions… that we have sold for many years… have retired. However, we were able to make one last purchase from them. We once again have some more very fine concretions to offer our customers. Clay stone glacial concretions are known by many names around the world. For…

Grossular Garnets Grossular is a calcium-aluminum species of the Garnet group of minerals. The name Grossular is derived from the botanical name for the gooseberry, “grossularia”, in reference to the green Garnet of this composition that is found in Siberia. Other shades include cinnamon brown (cinnamon stone variety), red, and yellow. Grossular Garnet is a…

Garnets in Muscovite A Garnet is not a single mineral, but is part of a group that contains closely related, minerals that form a series with each other, resulting in different varieties that vary only slightly in physical properties. Some of the varieties may be so similar that they are indistinguishable from one another without…

Garnets from Morganton NC The Garnet Mineral Group Garnet is not a single mineral, but a group that contains closely related, isomorphous minerals that form a series with each other. The Garnet members form intermediary minerals between each member, and may even intergrow within a single crystal. The Garnets vary only slightly in physical properties,…