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Mohs 6
minerals
The reference mineral for 6 is orthoclase.
← All properties
479
minerals · Mohs 6 minerals
Group
Feldspar
(K,Na,Ca)(Al,Si)₄O₈
Silicate
Triclinic
Mohs 6–6.5
Hematite
Fe₂O₃
Oxides & Hydroxide
Hexagonal
Mohs 5–6
Jade
Jadeite or nephrite
Silicate
Monoclinic
Mohs 6–7
Jadeite
NaAlSi₂O₆
Silicate
Monoclinic
Mohs 6–7
Variety
Labradorite
(Ca,Na)(Al,Si)₄O₈
Silicate
Triclinic
Mohs 6–6.5
Magnetite
Fe²⁺Fe³⁺₂O₄
Oxides & Hydroxide
Cubic
Mohs 5.5–6.5
Variety
Moonstone
KAlSi₃O₈
Silicate
Monoclinic
Mohs 6–6.5
Opal
SiO₂·nH₂O
Silicate
Hexagonal
Mohs 5.5–6.5
Pyrite
FeS₂
Sulfide
Cubic
Mohs 6–6.5
Rhodonite
CaMn₃Mn(Si₅O₁₅)
Silicate
Triclinic
Mohs 5.5–6.5
Sodalite
Na₄(Si₃Al₃)O₁₂Cl
Silicate
Cubic
Mohs 5.5–6
Variety
Tanzanite
Ca₂Al₃(SiO₄)₃(OH)
Silicate
Orthorhombic
Mohs 6–7
Turquoise
CuAl₆(PO₄)₄(OH)₈·4H₂O
Phosphate
Triclinic
Mohs 5–6
Actinolite
Ca₂(Mg₄.₅₋₂.₅Fe²⁺₀.₅₋₂.₅)Si₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Aegirine
NaFe³⁺Si₂O₆
Silicate
Monoclinic
Mohs 6–6.5
A
Aeschynite-(Ce)
(Ce,Ca,Fe,Th)(Ti,Nb)₂(O,OH)₆
Oxides & Hydroxide
Orthorhombic
Mohs 5–6
A
Aeschynite-(Nd)
(Nd,Ln,Ca)(Ti,Nb)₂(O,OH)₆
Oxides & Hydroxide
Orthorhombic
Mohs 5–6
Aeschynite-(Y)
(Y,Ln,Ca,Th)(Ti,Nb)₂(O,OH)₆
Oxides & Hydroxide
Orthorhombic
Mohs 5–6
Afghanite
(Na,K)₂₂Ca₁₀(Si₂₄Al₂₄)O₉₆(SO₄)₆Cl₆
Silicate
Hexagonal
Mohs 5.5–6
A
Agakhanovite-(Y)
YCa ₂KBe₃Si₁₂O₃₀
Silicate
Hexagonal
Mohs 6
Akatoreite
Mn²⁺₉Al₂Si₈O₂₄(OH)₈
Silicate
Triclinic
Mohs 6
Albite
Na(AlSi₃O₈)
Silicate
Triclinic
Mohs 6–6.5
A
Allabogdanite
(Fe,Ni)₂P
Native Element
Orthorhombic
Mohs 5–6
Group
Allanite
(Ca,Ce)₂(Al,Fe)₃Si₃O₁₂(OH)
Silicate
Monoclinic
Mohs 5.5–6
Allanite-(Ce)
CaCe(Al₂Fe²⁺)[Si₂O₇][SiO₄]O(OH)
Silicate
Monoclinic
Mohs 5.5–6
A
Allanite-(La)
CaLa(Al₂Fe²⁺)[Si₂O₇][SiO₄]O(OH)
Silicate
Monoclinic
Mohs 6
Allanite-(Nd)
CaNd(Al₂Fe²⁺)[Si₂O₇][SiO₄]O(OH)
Silicate
Monoclinic
Mohs 6
A
Alluaivite
Na₁₉(Ca,Mn²⁺)₆(Ti,Nb)₃Si₂₆O₇₄Cl·2H₂O
Silicate
Hexagonal
Mohs 5–6
Almeidaite
PbZn₂(Mn,Y)(Ti,Fe³⁺)₁₈O₃₆(OH,O)₂
Oxides & Hydroxide
Hexagonal
Mohs 6
A
Alnaperbøeite-(Ce)
(CaCe₂.₅Na₀.₅)(Al₄)(Si₂O₇)(SiO₄)₃O(OH)₂
Silicate
Monoclinic
Mohs 6–7
Alpeite
Ca₄Mn³⁺₂Al₂(Mn³⁺Mg)(SiO₄)₂(Si₃O₁₀)(VO₄)(OH)₆
Silicate
Orthorhombic
Mohs 5.5–6
Aluminosugilite
KNa₂Al₂Li₃Si₁₂O₃₀
Silicate
Hexagonal
Mohs 6–6.5
A
Amamoorite
CaMn²⁺₂Mn³⁺(Si₂O₇)O(OH)
Silicate
Monoclinic
Mohs 6
Variety
Amazonite
KAlSi₃O₈
Silicate
Triclinic
Mohs 6–6.5
Amblygonite
LiAl(PO₄)F
Phosphate
Triclinic
Mohs 5.5–6
Aminoffite
Ca₃(BeOH)₂Si₃O₁₀
Silicate
Tetragonal
Mohs 5.5–6
Group
Amphibole
A₀₋₁B₂C₅T₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6.5
Anatase
TiO₂
Oxides & Hydroxide
Tetragonal
Mohs 5.5–6
Variety
Andesine
(Ca,Na)(Al,Si)₄O₈
Silicate
Triclinic
Mohs 6–6.5
Anorthite
Ca(Al₂Si₂O₈)
Silicate
Triclinic
Mohs 6–6.5
Anthophyllite
Mg₂Mg₅Si₈O₂₂(OH)₂
Silicate
Orthorhombic
Mohs 5.5–6
A
Arapovite
(K₁₋ₓ ₓ)(Ca,Na)₂U⁴⁺Si₈O₂₀ [x ≈ 0.5]
Silicate
Tetragonal
Mohs 5.5–6
Ardennite-(V)
Mn²⁺₄Al₄(AlMg)(VO₄)(SiO₄)₂(Si₃O₁₀)(OH)₆
Silicate
Orthorhombic
Mohs 6–7
Arfvedsonite
NaNa₂(Fe²⁺₄Fe³⁺)Si₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
A
Argutite
GeO₂
Oxides & Hydroxide
Tetragonal
Mohs 6–7
A
Arsenoclasite
Mn²⁺₅(AsO₄)₂(OH)₄
Arsenate
Orthorhombic
Mohs 5–6
Arsenopyrite
FeAsS
Sulfosalt
Monoclinic
Mohs 5.5–6
Augite
(Ca,Mg,Fe)₂Si₂O₆
Silicate
Monoclinic
Mohs 5.5–6
Awaruite
Ni₃Fe
Native Element
Cubic
Mohs 5.5–6
Babingtonite
Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)
Silicate
Triclinic
Mohs 5.5–6
Baghdadite
Ca₆Zr₂(Si₂O₇)₂O₄
Silicate
Monoclinic
Mohs 6
Baotite
Ba₄(Ti,Nb,W)₈O₁₆(SiO₃)₄Cl
Silicate
Tetragonal
Mohs 6
Barbosalite
Fe²⁺Fe³⁺₂(PO₄)₂(OH)₂
Phosphate
Monoclinic
Mohs 6
B
Barroisite
(NaCa)(Mg₃Al₂)(Si₇Al)O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Batiferrite
BaTi₂Fe³⁺₈Fe²⁺₂O₁₉
Oxides & Hydroxide
Hexagonal
Mohs 6
Batisite
Na₂BaTi₂O₂(Si₂O₆)₂
Silicate
Orthorhombic
Mohs 6
Belkovite
Ba₃Nb₆(Si₂O₇)₂O₁₂
Silicate
Hexagonal
Mohs 6–7
Bementite
Mn₇Si₆O₁₅(OH)₈
Silicate
Monoclinic
Mohs 4.5–6
Benitoite
BaTiSi₃O₉
Silicate
Hexagonal
Mohs 6–6.5
Berdesinskiite
V³⁺₂TiO₅
Oxides & Hydroxide
Monoclinic
Mohs 6–6.5
Bertossaite
Li₂CaAl₄(PO₄)₄(OH)₄
Phosphate
Orthorhombic
Mohs 6
Bertrandite
Be₄Si₂O₇(OH)₂
Silicate
Orthorhombic
Mohs 6–7
Beryllonite
NaBe(PO₄)
Phosphate
Monoclinic
Mohs 5.5–6
Bikitaite
LiAlSi₂O₆·H₂O
Silicate
Triclinic
Mohs 6
Bixbyite-(Fe)
Fe³⁺₂O₃
Oxides & Hydroxide
Cubic
Mohs 6–6.5
Blatterite
Sb⁵⁺₃Mn³⁺₉Mn²⁺₃₅(BO₃)₁₆O₃₂
Borate
Orthorhombic
Mohs 6
B
Bohseite
Ca₄Be₃₊ₓAl₁₋ₓSi₉O₂₅₋ₓ(OH)₃₊ₓ (x = 0 to 1)
Silicate
Orthorhombic
Mohs 5–6
Braunite
Mn²⁺Mn³⁺₆O₈(SiO₄)
Silicate
Tetragonal
Mohs 6–6.5
Britholite-(Y)
(Y,Ca)₅(SiO₄)₃(OH)
Silicate
Monoclinic
Mohs 6
Brookite
TiO₂
Oxides & Hydroxide
Orthorhombic
Mohs 5.5–6
Burpalite
Na₄Ca₂Zr₂(Si₂O₇)₂F₄
Silicate
Monoclinic
Mohs 5–6
Bustamite
Mn₂Ca₂MnCa(Si₃O₉)₂
Silicate
Triclinic
Mohs 5.5–6.5
Byelorussite-(Ce)
NaBa₂Ce₂Mn²⁺Ti₂Si₈O₂₆(F,OH)·H₂O
Silicate
Orthorhombic
Mohs 5.5–6
Variety
Bytownite
(Ca,Na)(Al,Si)₄O₈
Silicate
Triclinic
Mohs 6–6.5
Cafarsite
(Ca,Na, )₁₉Ti₈Fe³⁺₄Fe²⁺₄(AsO₃)₂₈F
Arsenate
Cubic
Mohs 5.5–6
C
Calciosamarskite
(Ca,Fe,Y)(Nb,Ta,Ti)O₄
Oxides & Hydroxide
Monoclinic
Mohs 5–6
Calzirtite
Ca₂Zr₅Ti₂O₁₆
Oxides & Hydroxide
Tetragonal
Mohs 6–7
Cancrinite
(Na,Ca, )₈(Al₆Si₆)O₂₄(CO₃,SO₄)₂·2H₂O
Silicate
Hexagonal
Mohs 5–6
C
Canosioite
Ba₂Fe³⁺(AsO₄)₂(OH)
Arsenate
Monoclinic
Mohs 6–6.5
Cappelenite-(Y)
BaY₆B₆Si₃O₂₄F₂
Silicate
Hexagonal
Mohs 6–6.5
C
Capranicaite
KCaNaAl₄B₄Si₂O₁₈
Silicate
Monoclinic
Mohs 6
Carpholite
Mn²⁺Al₂Si₂O₆(OH)₄
Silicate
Orthorhombic
Mohs 5.5–6
Cassiterite
SnO₂
Oxides & Hydroxide
Tetragonal
Mohs 6–7
Catapleiite
Na₂Zr(Si₃O₉)·2H₂O
Silicate
Monoclinic
Mohs 6
Celsian
Ba(Al₂Si₂O₈)
Silicate
Monoclinic
Mohs 6–6.5
Charoite
(K,Sr,Ba,Mn)₁₅₋₁₆(Ca,Na)₃₂[Si₇₀(O,OH)₁₈₀](OH,F)₄·nH₂O
Silicate
Monoclinic
Mohs 5–6
Chegemite
Ca₇(SiO₄)₃(OH)₂
Silicate
Orthorhombic
Mohs 5.5–6
Chestermanite
Mg₂(Fe³⁺,Mg,Al,Sb⁵⁺)O₂(BO₃)
Borate
Orthorhombic
Mohs 6
Chevkinite-(Ce)
Ce₄(Ti,Fe²⁺,Fe³⁺)₅O₈(Si₂O₇)₂
Silicate
Monoclinic
Mohs 5.5–6
Chiappinoite-(Y)
Y₂Mn(Si₃O₇)₄
Silicate
Orthorhombic
Mohs 6
Chibaite
SiO₂·n(CH₄,C₂H₆,C₃H₈,C₄H₁₀) (nmaₓ = 3/17)
Organic Mineral
Cubic
Mohs 5.5–7
Chkalovite
Na₂BeSi₂O₆
Silicate
Orthorhombic
Mohs 6
Chondrodite
Mg₅(SiO₄)₂F₂
Silicate
Monoclinic
Mohs 6–6.5
Chromio-pargasite
NaCa₂(Mg₄Cr)(Si₆Al₂)O₂₂(OH)₂
Silicate
Monoclinic
Mohs 6
Cleusonite
Pb(U⁴⁺,U⁶⁺)Fe²⁺₂(Ti,Fe²⁺,Fe³⁺)₁₈(O,OH)₃₈
Oxides & Hydroxide
Hexagonal
Mohs 6–7
C
Clinoenstatite
Mg₂Si₂O₆
Silicate
Monoclinic
Mohs 5–6
Clinoferrosilite
Fe²⁺₂Si₂O₆
Silicate
Monoclinic
Mohs 5–6
Clinohumite
Mg₉(SiO₄)₄F₂
Silicate
Monoclinic
Mohs 6
Coffinite
U(SiO₄)·nH₂O
Silicate
Tetragonal
Mohs 5–6
C
Cohenite
CFe₃
Organic Mineral
Orthorhombic
Mohs 5.5–6
Group
Columbite
(Fe,Mn)Nb₂O₆
Oxides & Hydroxide
Orthorhombic
Mohs 6–6.5
Cristobalite
SiO₂
Silicate
Tetragonal
Mohs 6–7
Cryptomelane
K(Mn⁴⁺₇Mn³⁺)O₁₆
Oxides & Hydroxide
Tetragonal
Mohs 6–6.5
Cummingtonite
Mg₂Mg₅Si₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Cuspidine
Ca₈(Si₂O₇)₂F₄
Silicate
Monoclinic
Mohs 5–6
D
Dalnegorskite
Ca₅Mn(Si₃O₉)₂
Silicate
Triclinic
Mohs 6
Danalite
Be₃Fe²⁺₄(SiO₄)₃S
Silicate
Cubic
Mohs 5.5–6
Davidite-(Ce)
Ce(Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH,F)₃₈
Halide
Hexagonal
Mohs 6
Davidite-(La)
La(Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH,F)₃₈
Halide
Trigonal
Mohs 6
D
Davyne
[(Na,K)₆(SO₄)₀.₅Cl][Ca₂Cl₂][(Si₆Al₆O₂₄)]
Silicate
Hexagonal
Mohs 5.5–6
D
Delhuyarite-(Ce)
Ce₄Mg(Fe³⁺₂W) (Si₂O₇)₂O₆(OH)₂
Silicate
Monoclinic
Mohs 5–6
D
Diegogattaite
Na₂CaCu₂Si₈O₂₀·H₂O
Silicate
Monoclinic
Mohs 5–6
Diopside
CaMgSi₂O₆
Silicate
Monoclinic
Mohs 5.5–6.5
D
Dmisteinbergite
Ca(Al₂Si₂O₈)
Silicate
Hexagonal
Mohs 6
Donpeacorite
(Mn,Mg)MgSi₂O₆
Silicate
Orthorhombic
Mohs 5–6
Drugmanite
Pb₂Fe³⁺(PO₄)(PO₃OH)(OH)₂
Phosphate
Monoclinic
Mohs 6
Eckermannite
NaNa₂(Mg₄Al)Si₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Edenite
NaCa₂Mg₅(Si₇Al)O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Eirikite
KNa₆Be₂(Si₁₅Al₃)O₃₉F₂
Silicate
Hexagonal
Mohs 6
Emeleusite
Na₂LiFe³⁺Si₆O₁₅
Silicate
Orthorhombic
Mohs 5–6
Enstatite
Mg₂Si₂O₆
Silicate
Orthorhombic
Mohs 5–6
Epidote
Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)
Silicate
Monoclinic
Mohs 6–7
Ertixiite
Na₂Si₄O₉
Silicate
Cubic
Mohs 5.8–6.5
Esseneite
CaFe³⁺AlSiO₆
Silicate
Monoclinic
Mohs 6
Eudialyte
Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂
Silicate
Hexagonal
Mohs 5–6
Eudidymite
Na₂Be₂Si₆O₁₅·H₂O
Silicate
Monoclinic
Mohs 6
Euxenite-(Y)
(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Oxides & Hydroxide
Orthorhombic
Mohs 5.5–6.5
F
Fabianite
CaB₃O₅(OH)
Oxides & Hydroxide
Monoclinic
Mohs 6
F
Fergusonite-(Ce)
CeNbO₄·0.3H₂O
Oxides & Hydroxide
Tetragonal
Mohs 5.5–6.5
Fergusonite-(Y)
YNbO₄
Oxides & Hydroxide
Tetragonal
Mohs 5.5–6.5
Ferriakasakaite-(Ce)
CaCeFe³⁺AlMn²⁺(Si₂O₇)(SiO₄)O(OH)
Silicate
Monoclinic
Mohs 5.5–6
Ferriallanite-(Ce)
CaCe(Fe³⁺AlFe²⁺)[Si₂O₇][SiO₄]O(OH)
Silicate
Monoclinic
Mohs 6
F
Ferriallanite-(La)
CaLa(Fe³⁺AlFe²⁺)[Si₂O₇][SiO₄]O(OH)
Silicate
Monoclinic
Mohs 6
F
Ferricoronadite
Pb(Mn⁴⁺₆Fe³⁺₂)O₁₆
Oxides & Hydroxide
Tetragonal
Mohs 6
F
Ferriperbøeite-(Ce)
(CaCe₃)(Fe³⁺Al₂Fe²⁺)(Si₂O₇)(SiO₄)₃O(OH)₂
Silicate
Monoclinic
Mohs 6–7
F
Ferriperbøeite-(La)
(CaLa₃)(Fe³⁺Al₂Fe²⁺)[Si₂O₇][SiO₄]₃O(OH)₂
Silicate
Monoclinic
Mohs 6
F
Ferro-actinolite
Ca₂(Mg₂.₅₋₀.₀Fe²⁺₂.₅₋₅.₀)Si₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Ferro-edenite
NaCa₂Fe²⁺₅(Si₇Al)O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
F
Ferro-ferri-hornblende
Ca₂(Fe²⁺₄Fe³⁺)(Si₇Al)O₂₂(OH)₂
Silicate
Monoclinic
Mohs 6
F
Ferro-ferri-nybøite
NaNa₂(Fe²⁺₃Fe³⁺₂)(Si₇Al)O₂₂(OH)₂
Silicate
Monoclinic
Mohs 6
F
Ferro-fluoro-edenite
NaCa₂Fe²⁺₅(Si₇AlO₂₂)F₂
Silicate
Monoclinic
Mohs 5–6
Ferro-gedrite
Fe²⁺₂(Fe²⁺₃Al₂)(Si₆Al₂)O₂₂(OH)₂
Silicate
Orthorhombic
Mohs 5.5–6
Ferro-glaucophane
Na₂(Fe²⁺₃Al₂)Si₈O₂₂(OH)₂
Silicate
Mohs 6
Ferro-hornblende
Ca₂(Fe²⁺₄Al)(Si₇Al)O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Ferro-papikeite
NaFe²⁺₂(Fe²⁺₃Al₂)(Si₅Al₃)O₂₂(OH)₂
Silicate
Orthorhombic
Mohs 6
F
Ferro-pargasite
NaCa₂(Fe²⁺₄Al)(Si₆Al₂)O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
F
Ferro-pedrizite
NaLi₂(Fe²⁺₂Al₂Li)Si₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 6
Ferro-richterite
Na(NaCa)Fe²⁺₅Si₈O₂₂(OH)₂
Silicate
Mohs 5–6
F
Ferro-tschermakite
Ca₂(Fe²⁺₃Al₂)(Si₆Al₂)O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Ferrobustamite
CaFe²⁺Si₂O₆
Silicate
Triclinic
Mohs 6
Ferrokentbrooksite
Na₁₅Ca₆Fe²⁺₃Zr₃Nb(Si₂₅O₇₃)(O,OH,H₂O)₃(F,Cl)₂
Silicate
Hexagonal
Mohs 5–6
Ferrorhodonite
CaMn₃Fe(Si₅O₁₅)
Silicate
Triclinic
Mohs 6
Ferroselite
FeSe₂
Sulfide
Orthorhombic
Mohs 6–6.5
Ferrosilite
Fe²⁺₂Si₂O₆
Silicate
Orthorhombic
Mohs 6
F
Filatovite
K(Al,Zn)₂(As,Si)₂O₈
Silicate
Monoclinic
Mohs 5–6
Florencite-(Ce)
CeAl₃(PO₄)₂(OH)₆
Phosphate
Hexagonal
Mohs 5–6
F
Florencite-(Sm)
SmAl₃(PO₄)₂(OH)₆
Phosphate
Hexagonal
Mohs 5.5–6
F
Fluorchegemite
Ca₇(SiO₄)₃F₂
Silicate
Mohs 5.5–6
F
Fluormayenite
Ca₁₂Al₁₄O₃₂[ ₄F₂]
Halide
Cubic
Mohs 5.5–6
F
Fluoro-pargasite
NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂F₂
Silicate
Monoclinic
Mohs 6
F
Fluoro-tremolite
Ca₂Mg₅Si₈O₂₂F₂
Silicate
Monoclinic
Mohs 5–6
F
Fluorvesuvianite
Ca₁₉(Al,Mg)₁₃(SiO₄)₁₀(Si₂O₇)₄O(F,OH)₉
Silicate
Tetragonal
Mohs 6
Folvikite
Sb⁵⁺Mn³⁺(Mg,Mn²⁺)₁₀O₈(BO₃)₄
Borate
Monoclinic
Mohs 6
Foordite
Sn²⁺Nb₂O₆
Oxides & Hydroxide
Monoclinic
Mohs 6
Formanite-(Y)
YTaO₄
Oxides & Hydroxide
Monoclinic
Mohs 5.5–6.5
Franklinite
ZnFe³⁺₂O₄
Oxides & Hydroxide
Cubic
Mohs 5.5–6.5
F
Freboldite
CoSe
Sulfide
Hexagonal
Mohs 6
Fredrikssonite
Mg₂Mn³⁺O₂(BO₃)
Borate
Orthorhombic
Mohs 6
F
Friedrichbeckeite
K( Na)Mg₂(Be₂Mg)Si₁₂O₃₀
Silicate
Hexagonal
Mohs 6
Garrelsite
NaBa₃B₇Si₂O₁₆(OH)₄
Silicate
Monoclinic
Mohs 6
G
Gatelite-(Ce)
(Ca,Ce)₄(Al,Mg,Fe)₄(Si₂O₇)(SiO₄)₃(O,F,OH)₃
Silicate
Monoclinic
Mohs 6–7
Gaudefroyite
Ca₄Mn³⁺₃(BO₃)₃(CO₃)O₃
Borate
Hexagonal
Mohs 6
Gedrite
Mg₂(Mg₃Al₂)(Si₆Al₂)O₂₂(OH)₂
Silicate
Orthorhombic
Mohs 5.5–6
Gehlenite
Ca₂Al(SiAl)O₇
Silicate
Tetragonal
Mohs 5–6
Geikielite
MgTiO₃
Oxides & Hydroxide
Hexagonal
Mohs 5–6
Giuseppettite
Na₄₂K₁₆Ca₆Si₄₈Al₄₈O₁₉₂(SO₄)₁₀Cl₂·5H₂O
Silicate
Hexagonal
Mohs 6–7
Glaucochroite
CaMn²⁺(SiO₄)
Silicate
Orthorhombic
Mohs 6
Glaucophane
Na₂(Mg₃Al₂)Si₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 6–6.5
Gorceixite
BaAl₃(PO₄)(PO₃OH)(OH)₆
Phosphate
Hexagonal
Mohs 6
G
Grandaite
Sr₂Al(AsO₄)₂(OH)
Arsenate
Monoclinic
Mohs 6–6.5
Grunerite
Fe²⁺₂Fe²⁺₅Si₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Gudmundite
FeSbS
Sulfosalt
Monoclinic
Mohs 5–6
Hancockite
CaPb(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)
Silicate
Monoclinic
Mohs 6–7
Hastingsite
NaCa₂(Fe²⁺₄Fe³⁺)(Si₆Al₂)O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Haüyne
Na₃Ca(Si₃Al₃)O₁₂(SO₄)
Silicate
Cubic
Mohs 5.5–6
Hedenbergite
CaFe²⁺Si₂O₆
Silicate
Monoclinic
Mohs 5.5–6.5
Hellandite-(Y)
(Ca,REE)₄Y₂Al ₂(B₄Si₄O₂₂)(OH)₂
Silicate
Monoclinic
Mohs 4.5–6.5
Helvine
Be₃Mn²⁺₄(SiO₄)₃S
Silicate
Cubic
Mohs 6–6.5
H
Henrymeyerite
Ba(Ti₇Fe²⁺)O₁₆
Oxides & Hydroxide
Tetragonal
Mohs 5–6
Hetaerolite
ZnMn³⁺₂O₄
Oxides & Hydroxide
Tetragonal
Mohs 6
H
Hezuolinite
(Sr,REE)₄Zr(Ti,Fe³⁺,Fe²⁺)₂Ti₂O₈(Si₂O₇)₂
Silicate
Monoclinic
Mohs 5.5–6
Hillebrandite
Ca₂SiO₃(OH)₂
Silicate
Orthorhombic
Mohs 5–6
Hingganite-(Ce)
BeCe(SiO₄)(OH)
Silicate
Monoclinic
Mohs 5–6
H
Hingganite-(Nd)
Nd₂ Be₂Si₂O₈(OH)₂
Silicate
Monoclinic
Mohs 5.5–6
H
Hingganite-(Yb)
BeYb(SiO₄)(OH)
Silicate
Monoclinic
Mohs 6–7
Hollandite
Ba(Mn⁴⁺₆Mn³⁺₂)O₁₆
Oxides & Hydroxide
Monoclinic
Mohs 6
Hollingworthite
RhAsS
Sulfosalt
Cubic
Mohs 6
Holmquistite
Li₂(Mg₃Al₂)Si₈O₂₂(OH)₂
Silicate
Orthorhombic
Mohs 5–6
H
Holtstamite
Ca₃Al₂(SiO₄)₂(OH)₄
Silicate
Tetragonal
Mohs 6
Group
Hornblende
Ca₂(Mg,Fe,Al)₅(Al,Si)₈O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
Humite
Mg₇(SiO₄)₃F₂
Silicate
Orthorhombic
Mohs 6
H
Hundholmenite-(Y)
(Y,REE,Ca,Na)₁₅(Al,Fe³⁺)CaₓAs³⁺₁₋ₓ(Si,As⁵⁺)Si₆B₃(O,F)₄₈
Silicate
Hexagonal
Mohs 5–6
Hurlbutite
CaBe₂(PO₄)₂
Phosphate
Monoclinic
Mohs 6
Hydroxycalciomicrolite
Ca₁.₅Ta₂O₆(OH)
Oxides & Hydroxide
Cubic
Mohs 5–6
H
Hydroxycalciopyrochlore
(Ca,Na,U, )₂(Nb,Ti)₂O₆(OH)
Oxides & Hydroxide
Cubic
Mohs 5–6
Hydroxycancrinite
(Na,Ca,K)₈(Al₆Si₆O₂₄)(OH,CO₃)₂·2H₂O
Silicate
Hexagonal
Mohs 6
H
Hydroxylchondrodite
Mg₅(SiO₄)₂(OH)₂
Silicate
Monoclinic
Mohs 6
Iimoriite-(Y)
Y₂(SiO₄)(CO₃)
Silicate
Triclinic
Mohs 5.5–6
Ilmenite
Fe²⁺Ti⁴⁺O₃
Oxides & Hydroxide
Hexagonal
Mohs 5–6
Ilvaite
CaFe³⁺Fe²⁺₂O(Si₂O₇)(OH)
Silicate
Monoclinic
Mohs 5.5–6
Inesite
Ca₂Mn²⁺₇Si₁₀O₂₈(OH)₂·5H₂O
Silicate
Triclinic
Mohs 5.5–6
I
Innsbruckite
Mn₃₃(Si₂O₅)₁₄(OH)₃₈
Silicate
Monoclinic
Mohs 6
Iridium
Ir
Native Element
Cubic
Mohs 6–7
I
Ishikawaite
(U,Fe,Y)NbO₄
Oxides & Hydroxide
Monoclinic
Mohs 5–6
I
Iwashiroite-(Y)
YTaO₄
Oxides & Hydroxide
Monoclinic
Mohs 6
Jacobsite
Mn²⁺Fe³⁺₂O₄
Oxides & Hydroxide
Cubic
Mohs 5.5–6.5
J
Jarandolite
CaB₃O₄(OH)₃
Oxides & Hydroxide
Monoclinic
Mohs 6
Jeppeite
(K,Ba)₂(Ti,Fe³⁺)₆O₁₃
Oxides & Hydroxide
Monoclinic
Mohs 5–6
Johannsenite
CaMnSi₂O₆
Silicate
Monoclinic
Mohs 6
J
Johnsenite-(Ce)
Na₁₂Ce₃Ca₆Mn₃Zr₃WSi₂₅O₇₃(CO₃)(OH)₂
Silicate
Hexagonal
Mohs 5–6
Kaersutite
NaCa₂(Mg₃AlTi⁴⁺)(Si₆Al₂)O₂₂O₂
Silicate
Monoclinic
Mohs 5–6
Kahlenbergite
KAl₁₁O₁₇
Oxides & Hydroxide
Hexagonal
Mohs 6–7
Kainosite-(Y)
Ca₂Y₂(SiO₃)₄(CO₃)·H₂O
Silicate
Orthorhombic
Mohs 5–6
Kalborsite
K₆Al₄BSi₆O₂₀(OH)₄Cl
Silicate
Tetragonal
Mohs 6
Kaliophilite
KAlSiO₄
Silicate
Hexagonal
Mohs 6
Kalsilite
KAlSiO₄
Silicate
Hexagonal
Mohs 6
K
Kannanite
Ca₄Al₄(MgAl)(VO₄)(SiO₄)₂(Si₃O₁₀)(OH)₆
Silicate
Orthorhombic
Mohs 6
Kanoite
MnMgSi₂O₆
Silicate
Monoclinic
Mohs 6
K
Kapustinite
Na₆ZrSi₆O₁₆(OH)₂
Silicate
Trigonal
Mohs 6
Katophorite
Na(NaCa)(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Silicate
Monoclinic
Mohs 5–6
K
Kenoplumbomicrolite
(Pb, )₂Ta₂O₆[ ,(OH),O]
Oxides & Hydroxide
Cubic
Mohs 6
Kentbrooksite
(Na,REE)₁₅(Ca,REE)₆Mn₃Zr₃Nb(Si₂₅O₇₃)(O,OH,H₂O)₃(F,Cl)₂
Silicate
Hexagonal
Mohs 5–6
Kentrolite
Pb₂Mn³⁺₂O₂(Si₂O₇)
Silicate
Orthorhombic
Mohs 6
Kesebolite-(Ce)
CeCa₂Mn(AsO₄)(SiO₃)₃
Silicate
Monoclinic
Mohs 5–6
Khesinite
Ca₄(Mg₂Fe³⁺₁₀)O₄(Fe³⁺₁₀Si₂)O₃₆
Silicate
Triclinic
Mohs 6
Khomyakovite
Na₁₂Sr₃Ca₆Fe₃Zr₃W(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂
Silicate
Hexagonal
Mohs 5–6
K
Kingstonite
Rh₃S₄
Sulfide
Monoclinic
Mohs 6
K
Kirchhoffite
CsBSi₂O₆
Silicate
Tetragonal
Mohs 6–6.5
K
Koashvite
Na₆CaTiSi₆O₁₈
Silicate
Orthorhombic
Mohs 6
Kosmochlor
NaCr³⁺Si₂O₆
Silicate
Monoclinic
Mohs 6
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