'Fluorite from Ft. Wayne,Indiana'
Numéro d’image : 12000171
| Fluorite,calcium fluoride,is an abundant mineral that occurs commonly throughout the world in both massive deposits and veins,and also as excellent well-formed crystals (generally cube shaped,or cubic) in veins in ore deposits. Fluorite when pure is colorless,but traces of chemical impurities produce a huge palette of colors. Crystals can grow to several feet in size,and are frequently transparent. Fluorite has been used as a gem material,and a number of cut gems weighing more than 1,000 carats have been cut from crystals of various colors. Major localities include England,Illinois,Missouri,Indiana,Pakistan,Switzerland,New Hampshire,China and Argentina. Lead mines near Ft. Wayne,Indiana have produced spectacular fluorite crystals | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Arem, Joel |
| Taille de l’image : | 3855 px × 2553 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : |
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