Changes

[[Image:Amphibole.jpg|thumb|300px]]The '''amphiboles''' are a family of [[silica]]te [[mineral]]s that form prism or needle-like [[crystal]]s. Amphibole minerals generally contain [[iron]], [[magnesium]], [[calcium]] and [[aluminum]] in varying amounts along with [[silicon]], [[oxygen]], and [[water]]. Hornblende, shown in this image, is a common dark green to black variety of amphibole; it is a component in many [[igneous]] and [[metamorphic]] rocks.<ref>http://wrgis.wr.usgs.gov/docs/parks/rxmin/mineral.html#amphibole</ref>

[[Image:Amphibole.jpg|thumb|300px]]The '''amphiboles''' are a family of [[silica]]te [[mineral]]s that form prism or needle-like [[crystal]]s. Amphibole minerals generally contain [[iron]], [[magnesium]], [[calcium]] and [[aluminum]] in varying amounts along with [[silicon]], [[oxygen]], and [[water]]. [[Hornblende]], shown in this image, is a common dark green to black variety of amphibole; it is a component in many [[igneous]] and [[metamorphic]] rocks.<ref>http://wrgis.wr.usgs.gov/docs/parks/rxmin/mineral.html#amphibole</ref>

==References==

==References==