garnet group
Sign in to saveGarnets () are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives.
AI overview
Garnets are a group of silicate minerals that have been valued for thousands of years, dating back to the Bronze Age, as both gemstones for jewelry and as abrasive materials for cutting and polishing. They matter because of their dual utility—their beauty makes them desirable as gems, while their hardness and abrasive properties make them useful in industrial applications.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Mineral.streak
- White
- Mineral.name
- Garnet
- Mineral.category
- Nesosilicate
- Mineral.boxbgcolor
- 733635
- Mineral.boxtextcolor
- white
- Mineral.image
- Garnet Andradite20.jpg
- Mineral.formula
- The general formula X3Y2(SiO4)3
- Mineral.IMAsymbol
- Grt
- Mineral.symmetry
- Ia3d
- Mineral.class
- 4/m\bar{3} 2/m
- Mineral.color
- virtually all colors, blue is rare
- Mineral.habit
- Rhombic dodecahedron or cubic
- Mineral.system
Article
29 sectionsContents
- Etymology
- Physical properties
- Properties
- Crystal structure
- Hardness
- Magnetics used in garnet series identification
- Garnet group end member species
- Pyralspite garnets – aluminium in ''Y'' site
- Almandine
- Pyrope
- Spessartine
- Pyrope–spessartine (blue garnet or color-change garnet)
- Ugrandite group – calcium in ''X'' site
- Andradite
- Grossular
- Uvarovite
- Less common species
- Knorringite
- Garnet structural group
- Synthetic garnets
- Geological importance
- Largest garnet crystal
- Uses
- Gemstones
- Industrial uses
- See also
- References
- Further reading
- External links
{{Infobox mineral | name = Garnet | category = Nesosilicate | boxwidth = | boxbgcolor = #733635 | boxtextcolor = white | image = Garnet Andradite20.jpg | alt = | caption = | formula = The general formula X3Y2(SiO4)3 | IMAsymbol = Grt | molweight = | symmetry = Ia3d | class = 4/m\bar{3} 2/m | color = virtually all colors, blue is rare | habit = Rhombic dodecahedron or cubic | system = Isometric | twinning = | cleavage = Indistinct | fracture = conchoidal to uneven | mohs = 6.5–7.5 | luster = vitreous to resinous | diaphaneity = Can form with any diaphaneity, translucent is common | polish = vitreous to subadamantine | refractive = 1.72–1.94 | opticalprop = Single refractive, often anomalous double refractive | birefringence = None | pleochroism = None | streak = White | gravity = 3.1–4.3 | melt = | fusibility = | diagnostic = | solubility = | fluorescence= variable | other = variable magnetic attraction | var1 = Pyrope | var1text = Mg3Al2Si3O12 | var2 = Almandine | var2text = Fe3Al2Si3O12 | var3 = Spessartine | var3text = Mn3Al2Si3O12 | var4 = Andradite | var4text = Ca3Fe2Si3O12 | var5 = Grossular | var5text = Ca3Al2Si3O12 | var6 = Uvarovite | var6text = Ca3Cr2Si3O12 }}
Garnets () are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives.