An orange calcite crystal and crystals of galena found at Joplin, Missouri in the USA. Galena (lead sulphide) usally occurs as compacted masses of cub
An orange calcite crystal and crystals of galena found at Joplin, Missouri in the USA. Galena (lead sulphide) usally occurs as compacted masses of cubic lead-grey crystals, such as these, although some possess a rarer octahedral form. A common mineral appearing in various types of rocks, it is the most important ore of lead and is found with silver as a frequent by-product. Calcite (calcium carbonate) is a typical sedimentary mineral which usually occurs in large masses.
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Photo credit: © SINCLAIR STAMMERS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: calcite, earth, galena, geology, mineral, science
