Serandite is a mineral with formula Na(Mn2+,Ca)2Si3O8(OH). The mineral was discovered in Guinea in 1931 and named for J. M. Sérand. Serandite is generally red, brown, black or colorless. The correct name lacks an accent.
via Wikipedia infobox
{{infobox mineral | name = Serandite | category = Inosilicates | boxwidth = | boxbgcolor =#FA8072 | image = Serandite-Aegirine-20264.jpg | imagesize = 260px | caption = Serandite from Mont Saint-Hilaire, Quebec, Canada | formula = Na(Mn2+,Ca)2Si3O8(OH) | IMAsymbol = Srd | molweight = | strunz = 9.DG.05 | dana = 65.2.1.5 | system = Triclinic | class = Pinacoidal () (same H-M symbol) | symmetry = P | unit cell = a = 7.683(1) Å, b = 6.889(1) Å c = 6.747(1) Å, α = 90.53(5)° β = 94.12(2)°, γ = 102.75(2)° Z = 2 | color = | habit = | twinning = Around [010] composition plane {100}, less commonly contact twin on {110} | cleavage = Perfect on {001} and {100} | fracture = Irregular, uneven | tenacity = Brittle | mohs = 5 to 5.5 | luster = Vitreous to greasy; fibrous aggregates are dull to silky | polish = | refractive = nα = 1.668nβ = 1.671nγ = 1.703 | opticalprop = Biaxial (+) | birefringence = δ = 0.035 | 2V = 39° | dispersion = r 3 (measured) | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = Transparent, Translucent | other = | references = |colour=salmon pink to orange}} Serandite is a mineral with formula Na(Mn2+,Ca)2Si3O8(OH). The mineral was discovered in Guinea in 1931 and named for J. M. Sérand. Serandite is generally red, brown, black or colorless. The correct name lacks an accent.
==Description== Serandite is transparent to translucent and is normally salmon-pink, light pink, rose-red, orange, brown, black, or colorless; in thin section, it is colorless. Octahedrally bonded Mn(II) is the primary contributor to the mineral's pink colors.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).