File:Fluorite (May Stone Company quarry, near Ft. Wayne, Indiana, USA).jpg
Original file (1,254 × 1,067 pixels, file size: 967 KB, MIME type: image/jpeg)
Captions
Captions
Summary edit
.jpg&action=edit§ion=1){kind=link}
| Description |
English: Fluorite from Indiana, USA. (public display, Geology Department, Wittenberg University, Springfield, Ohio, USA)
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are about 5400 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates. The halides are the "salt minerals", and have one or more of the following anions: Cl-, F-, I-, Br-. Fluorite is a calcium fluoride mineral (CaF2). The most diagnostic physical property of fluorite is its hardness (H≡4). Fluorite typically forms cubic crystals and, when broken, displays four cleavage planes (also quite diagnostic). When broken under controlled conditions, the broken pieces of fluorite form double pyramids. Fluorite is a good example of a mineral that can be any color. Common fluorite colors include clear, purple, blue, green, yellow, orange, and brown. The stereotypical color for fluorite is purple. Purple is the color fluorite "should be". A mineral collector doesn't have fluorite unless it's a purple fluorite (!). Fluorite occurs in association with some active volcanoes. HF emitted from volcanoes can react with Ca-bearing rocks to form fluorite crystals. Many hydrothermal veins contain fluorite. Much fluorite also occurs in the southern Illinois area (Mississippi Valley-type deposits). Locality: May Stone Company quarry, near the town of Ft. Wayne, Allen County, northeastern Indiana, USA Photo gallery of fluorite: www.mindat.org/gallery.php?min=1576 |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/40479362895/ |
| Author | James St. John |
Licensing edit
.jpg&action=edit§ion=2){kind=link}
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
|
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/40479362895 (archive). It was reviewed on 22 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:26, 22 December 2019 | | 1,254 × 1,067 (967 KB) | Ser Amantio di Nicolao (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
.jpg&oldid=685340289){kind=link}