Goethite: The mineral goethite information and pictures
Goethite is a common mineral, and is a frequent matrix material for other more aesthetic minerals. It is usually a dark, uninteresting mineral, though specimens from ...
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Goethite is a common mineral, and is a frequent matrix material for other more aesthetic minerals. It is usually a dark, uninteresting mineral, though specimens from ...
About Mineral Classics "Mineral Classics", established in 1970, and located near Black Hawk, Colorado, is a leading company dedicated to supplying excellent quality ...
carbon. The surface of chilled iron castings is extremely hard. The depth and hardness of the chilled portion may be controlled by adjusting the composition of the metal.
The violet to purple amethyst is the most important and best known gem variety of quartz and has been used for lapidary works since ancient times.
Current List: Each month, we offer an abbreviated selection of minerals from our inventory of over 200,000 samples. If you don''t see what you''re ...
Vertical quartz veins in a coarsegrained red granite at Cala Sarraina beach, at the northern end of the Costa Paradiso, Trinità d'' Agultu, Sassari Province ...
Hydrothermal pyrite has been frequently mistaken for gold and therefore the name fool''s gold. It is much more common than gold and it is not very difficult to tell ...
The principal ore of aluminum is bauxite, a complex mixture of a number of aluminum hydroxides and hydrous aluminum oxides. The most common aluminumbearing ...
INDIAN AGATE STONE THE POWERFUL NATURAL HEALING GEMSTONE. A revolution in your life . The star gemstone. Cut out of your genuine ruling gemstone
Red Gemstones Minerals. The following is a list of Red gems and minerals listed in our database. Click the pictures to get full data, click the X to remove the gem ...
What is Pyrite? Pyrite is a brassyellow mineral with a bright metallic luster. It has a chemical composition of iron disulfide (FeS 2) and is the most common sulfide ...
Lowergrade sources of iron ore generally require beneficiation, using techniques like crushing, milling, gravity or heavy media separation, screening, and silica ...
Veracruz, Pedra Parada, Mexico Very nice cluster of terminated amethyst crystals ! The color is great and one of them show a nice shepter. The size is up to cm ...
Geologic Occurrence. Limonite usually occurs as a secondary material, formed from the weathering of hematite, magnetite, pyrite, and other ironbearing materials.
Latest Additions. Below are the most recent additions to my specimens database. Click on any of the thumbnails to view a larger image of the specimen.
Abscisic acid Abscisic acid is a naturally occurring hormone in plants. Acenaphthylene Acenaphthylene is a low molecular weight, 2ring polycyclic aromatic ...
Iron is a chemical element with symbol Fe (from Latin: ferrum) and atomic number 26. It is a metal in the first transition series. It is by mass the most common ...
carbon. The surface of chilled iron castings is extremely hard. The depth and hardness of the chilled portion may be controlled by adjusting the composition of the metal.
Detailed description, properties, locality information guide about the mineral siderite.
The principal ore of aluminum is bauxite, a complex mixture of a number of aluminum hydroxides and hydrous aluminum oxides. The most common aluminumbearing ...
Obsidian Obsidian is volcanic glass. Oligoclase Oligoclase has the formulae (Na,Ca)AlSi3O8 and a relative hardness of 7. It is a plagioclase feldspar.