To find out more about rocks and minerals
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to go the the Natural History Museum's minerals gallery
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Charlotte Bailey Rocks Fossils and Minerals
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to go to my Fossils Information Page
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Q: What is meant by "inclusions" ?
This literally means that the piece has acquired an additional feature in its formation, for example some quartz will clearly show such inclusions of minerals, Black inclusions tend to be Tourmaline rods, Green Azurite and Gold/Rust shades Iron trying to infuse. They make for very interesting specimens.
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Q: What is meant by Hydro-Thermal Veins ?
Many good specimens are obtained from mineral veins. High temperature fluids deposit minerals in cracks and fissures in rocks these are often called hydrothermal veins and are frequently worked as sources of ore, they often contain colourful specimens and good crystals. Sometimes weathered- out cavity linings called Geodes are lined with well-shaped crystals and many fine specimens of Amethyst occur in these. Many crystal formations occur in Hydro- thermal veins. The largest are not always the most spectacular and some of the smallest crystals are the most perfectly formed ones.
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Q: What is double terminated Quartz ?
Most crystals have a single pointed end but in the case of Double terminated this simply means they have a point at both ends. See stock pictures "Double terminated Quartz" one of my exhibition pieces is exceptional as it features both a double point and has an amazing inclusion of trapped water !
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On this page you will find background information about rocks and minerals.
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