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Quartz, feldspar, mica — the common minerals that make up the ground.
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77
minerals · Rock-Forming · sorted with popular first
Group
Apatite
Ca₅(PO₄)₃(F,Cl,OH)
Phosphate
Hexagonal
Mohs 5
Baryte
Ba(SO₄)
Sulfate
Orthorhombic
Mohs 3–3.5
Group
Biotite
K(Mg,Fe)₃(AlSi₃O₁₀)(OH)₂
Silicate
Monoclinic
Mohs 2.5–3
Calcite
Ca(CO₃)
Carbonate
Hexagonal
Mohs 3
Group
Feldspar
(K,Na,Ca)(Al,Si)₄O₈
Silicate
Triclinic
Mohs 6–6.5
Forsterite
Mg₂(SiO₄)
Silicate
Orthorhombic
Mohs 6.5–7
Gypsum
Ca(SO₄)·2H₂O
Sulfate
Monoclinic
Mohs 2
Halite
NaCl
Halide
Cubic
Mohs 2.5
Hematite
Fe₂O₃
Oxides & Hydroxide
Hexagonal
Mohs 5–6
Magnetite
Fe²⁺Fe³⁺₂O₄
Oxides & Hydroxide
Cubic
Mohs 5.5–6.5
Muscovite
KAl₂(Si₃Al)O₁₀(OH)₂
Silicate
Monoclinic
Mohs 2–2.5
Mineraloid
Obsidian
SiO₂-rich volcanic glass
Silicate
Amorphous
Mohs 5–5.5
Group
Olivine
(Mg,Fe)₂SiO₄
Silicate
Orthorhombic
Mohs 6.5–7
Pyrite
FeS₂
Sulfide
Cubic
Mohs 6–6.5
Featured
Quartz
SiO₂
Silicate
Hexagonal
Mohs 7
Sulphur
S
Native Element
Orthorhombic
Mohs 1.5–2.5
Actinolite
Ca₂(Mg₄.₅₋₂.₅Fe²⁺₀.₅₋₂.₅)Si₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Albite
Na(AlSi₃O₈)
Silicate
Triclinic
Mohs 6–6.5
Group
Amphibole
A₀₋₁B₂C₅T₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6.5
Anhydrite
Ca(SO₄)
Sulfate
Orthorhombic
Mohs 3–3.5
Annite
KFe²⁺₃(AlSi₃O₁₀)(OH)₂
Silicate
Monoclinic
Mohs 2.5–3
Anorthite
Ca(Al₂Si₂O₈)
Silicate
Triclinic
Mohs 6–6.5
Antigorite
Mg₃Si₂O₅(OH)₄
Silicate
Monoclinic
Mohs 2.5–3.5
Aragonite
Ca(CO₃)
Carbonate
Orthorhombic
Mohs 3.5–4
Augite
(Ca,Mg,Fe)₂Si₂O₆
Silicate
Monoclinic
Mohs 5.5–6
Borax
Na₂B₄O₅(OH)₄·8H₂O
Borate
Monoclinic
Mohs 2–2.5
Böhmite
AlO(OH)
Oxides & Hydroxide
Orthorhombic
Mohs 3.5
Carnallite
KMgCl₃·6H₂O
Halide
Orthorhombic
Mohs 2.5
Rock
Chert
SiO₂ (cryptocrystalline)
Silicate
Trigonal
Mohs 7
Group
Chlorite
(Mg,Fe,Al)₆(Si,Al)₄O₁₀(OH)₈
Silicate
Monoclinic
Mohs 2–2.5
Chrysotile
Mg₃Si₂O₅(OH)₄
Silicate
Monoclinic
Mohs 2.5–3.5
Dolomite
CaMg(CO₃)₂
Carbonate
Hexagonal
Mohs 3.5–4
Enstatite
Mg₂Si₂O₆
Silicate
Orthorhombic
Mohs 5–6
Epidote
Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)
Silicate
Monoclinic
Mohs 6–7
Epsomite
Mg(SO₄)·7H₂O
Sulfate
Orthorhombic
Mohs 2–2.5
Ferro-hornblende
Ca₂(Fe²⁺₄Al)(Si₇Al)O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Rock
Flint
SiO₂ (cryptocrystalline)
Silicate
Trigonal
Mohs 7
Gibbsite
Al(OH)₃
Oxides & Hydroxide
Monoclinic
Mohs 2.5–3
Group
Glauconite
(K,Na)(Fe,Al,Mg)₂(Si,Al)₄O₁₀(OH)₂
Silicate
Monoclinic
Mohs 2
Goethite
FeO(OH)
Oxides & Hydroxide
Orthorhombic
Mohs 5–5.5
Graphite
C
Native Element
Orthorhombic
Mohs 1–2
Halloysite-7Å
Al₂Si₂O₅(OH)₄
Silicate
Monoclinic
Mohs 2–2.5
Hectorite
Na₀.₃(Mg,Li)₃Si₄O₁₀(F,OH)₂·nH₂O
Silicate
Mohs 1–2
Group
Hornblende
Ca₂(Mg,Fe,Al)₅(Al,Si)₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Howlite
Ca₂SiB₅O₉(OH)₅
Silicate
Monoclinic
Mohs 3.5
Hydroxylapatite
Ca₅(PO₄)₃OH
Phosphate
Hexagonal
Mohs 5
Group
Illite
K₀.₆₅Al₂(Al₀.₆₅Si₃.₃₅)O₁₀(OH)₂
Silicate
Monoclinic
Mohs 1–2
Ilmenite
Fe²⁺Ti⁴⁺O₃
Oxides & Hydroxide
Hexagonal
Mohs 5–6
Kaolinite
Al₂Si₂O₅(OH)₄
Silicate
Triclinic
Mohs 2–2.5
Kieserite
Mg(SO₄)·H₂O
Sulfate
Monoclinic
Mohs 3.5
Limonite
FeO(OH)·nH₂O
Oxides & Hydroxide
Amorphous
Mohs 4–5.5
Lizardite
Mg₃Si₂O₅(OH)₄
Silicate
Hexagonal
Mohs 2.5
Magnesio-hornblende
Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Magnesite
Mg(CO₃)
Carbonate
Hexagonal
Mohs 3.5–4.5
Group
Mica
XY₂₋₃Z₄O₁₀(OH,F)₂
Silicate
Monoclinic
Mohs 2–3
Microcline
K(AlSi₃O₈)
Silicate
Triclinic
Mohs 6–6.5
Variety
Milky Quartz
SiO₂
Silicate
Trigonal
Mohs 7
Mirabilite
Na₂(SO₄)·10H₂O
Sulfate
Monoclinic
Mohs 1.5–2
Montmorillonite
(Na,Ca)₀.₃(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O
Silicate
Monoclinic
Mohs 1–2
Nepheline
Na₃K(Al₄Si₄O₁₆)
Silicate
Hexagonal
Mohs 5.5–6
Niter
K(NO₃)
Nitrate
Orthorhombic
Mohs 2
Nitratine
Na(NO₃)
Nitrate
Hexagonal
Mohs 1.5–2
Orthoclase
K(AlSi₃O₈)
Silicate
Monoclinic
Mohs 6–6.5
Palygorskite
(Mg,Al)₂Si₄O₁₀(OH)·4H₂O
Silicate
Monoclinic
Mohs 2
Phlogopite
KMg₃(AlSi₃O₁₀)(OH)₂
Silicate
Monoclinic
Mohs 2–2.5
Group
Plagioclase
(Na,Ca)(Al,Si)₄O₈
Silicate
Triclinic
Mohs 6–6.5
Polyhalite
K₂Ca₂Mg(SO₄)₄·2H₂O
Sulfate
Triclinic
Mohs 3.5
Rock
Pumice
Vesicular volcanic glass
Silicate
Amorphous
Mohs 5–6
Pyrophyllite
Al₂Si₄O₁₀(OH)₂
Silicate
Triclinic
Mohs 1–1.5
Group
Pyroxene
XY(Si,Al)₂O₆
Silicate
Monoclinic
Mohs 5–7
Rock
Quartzite
SiO₂ (metamorphic rock)
Silicate
Trigonal
Mohs 7
Group
Serpentine
(Mg,Fe)₃Si₂O₅(OH)₄
Silicate
Monoclinic
Mohs 2.5–3.5
Sylvite
KCl
Halide
Cubic
Mohs 2
Talc
Mg₃Si₄O₁₀(OH)₂
Silicate
Triclinic
Mohs 1
Tremolite
Ca₂(Mg₅.₀₋₄.₅Fe²⁺₀.₀₋₀.₅)Si₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Vermiculite
Mg₀.₇(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄·8H₂O
Silicate
Monoclinic
Mohs 1.5
Wollastonite
CaSiO₃
Silicate
Triclinic
Mohs 4.5–5