ruizite

{{Infobox mineral | name = Ruizite | category = Sorosilicate | boxwidth = | boxbgcolor = | image = Ruizite-Calcite-180789.jpg | imagesize = 260px | caption = Clusters of ruizite on calcite from South Africa | formula = Ca2Mn2Si4O11(OH)4·2H2O | IMAsymbol = Rz | molweight = | strunz = 9.BJ.35 | dana = 57.2.2.1 | system = Monoclinic | class = Prismatic (2/m) (same H-M symbol) | symmetry = P21/c | unit cell = a = 11.95 Å, b = 6.17 Å c = 9.03 Å, β = 91.37°; Z = 4 | color = Orange, red-brown | habit = | twinning = Common on {100} | cleavage = | fracture = | tenacity = | mohs = 5 | luster = | polish = | refractive = nα = 1.663nβ = 1.715nγ = 1.734 | opticalprop = Biaxial (-) | birefringence = δ = 0.071 | 2V = 60° | dispersion = | pleochroism = | fluorescence= | absorption = | streak = Apricot | gravity = | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = Translucent | other = | references = }} Ruizite is a sorosilicate mineral with formula Ca2Mn2Si4O11(OH)4·2H2O. It was discovered at the Christmas mine in Christmas, Arizona, and described in 1977. The mineral is named for discoverer Joe Ana Ruiz.

==Description and occurrence== thumb|left|Ruizite from Arizona Ruizite is translucent and orange to red-brown in color with an apricot yellow streak. The mineral occurs as euhedral prisms up to or as radial clusters of acicular (needle-like) crystals.