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Orthorhombic
minerals
Three unequal axes, all at 90°.
← All properties
1,113
minerals · Orthorhombic minerals
Baryte
Ba(SO₄)
Sulfate
Orthorhombic
Mohs 3–3.5
Forsterite
Mg₂(SiO₄)
Silicate
Orthorhombic
Mohs 6.5–7
Group
Olivine
(Mg,Fe)₂SiO₄
Silicate
Orthorhombic
Mohs 6.5–7
Variety
Peridot
(Mg,Fe)₂SiO₄
Silicate
Orthorhombic
Mohs 6.5–7
Sulphur
S
Native Element
Orthorhombic
Mohs 1.5–2.5
Variety
Tanzanite
Ca₂Al₃(SiO₄)₃(OH)
Silicate
Orthorhombic
Mohs 6–7
Topaz
Al₂SiO₄F₂
Silicate
Orthorhombic
Mohs 8
Abuite
CaAl₂(PO₄)₂F₂
Phosphate
Orthorhombic
A
Achyrophanite
(K,Na)₃(Fe³⁺,Ti,Al,Mg)₅O₂(AsO₄)₅
Arsenate
Orthorhombic
A
Acmonidesite
(NH₄,K,Pb,Na)₉Fe²⁺₄(SO₄)₅Cl₈
Sulfate
Orthorhombic
Adamite
Zn₂(AsO₄)(OH)
Arsenate
Orthorhombic
Mohs 3.5
Adelite
CaMg(AsO₄)(OH)
Arsenate
Orthorhombic
Mohs 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
A
Agaite
Pb₃Cu²⁺Te⁶⁺O₅(OH)₂(CO₃)
Carbonate
Orthorhombic
Mohs 2–3
A
Agmantinite
Ag₂MnSnS₄
Sulfide
Orthorhombic
Mohs 2–2.5
Agrinierite
K₂Ca[(UO₂)₃O₃(OH)₂]₂·5H₂O
Oxides & Hydroxide
Orthorhombic
Aikinite
CuPbBiS₃
Sulfosalt
Orthorhombic
Mohs 2–2.5
Aksaite
MgB₆O₇(OH)₆·2H₂O
Borate
Orthorhombic
Mohs 2.5
Alcantarillaite
[Fe³⁺₀.₅(H₂O)₄][CaAs³⁺₂(Fe³⁺₂.₅W⁶⁺₀.₅)(AsO₄)₂O₇]
Arsenate
Orthorhombic
Aldermanite
[Mg(H₂O)₆][Na(H₂O)₂Al₃(PO₄)₂(OH)₆]·H₂O
Phosphate
Orthorhombic
Mohs 2
Variety
Alexandrite
BeAl₂O₄
Oxides & Hydroxide
Orthorhombic
Mohs 8.5
A
Alfredstelznerite
Ca₄(H₂O)₄[B₄O₄(OH)₆]₄(H₂O)₁₅
Borate
Orthorhombic
Mohs 2
A
Allabogdanite
(Fe,Ni)₂P
Native Element
Orthorhombic
Mohs 5–6
Alpeite
Ca₄Mn³⁺₂Al₂(Mn³⁺Mg)(SiO₄)₂(Si₃O₁₀)(VO₄)(OH)₆
Silicate
Orthorhombic
Mohs 5.5–6
Alstonite
BaCa(CO₃)₂
Carbonate
Orthorhombic
Mohs 4–4.5
Althausite
Mg₄(PO₄)₂(OH,O)(F, )
Phosphate
Orthorhombic
Mohs 3.5–4
Alumotantite
AlTaO₄
Oxides & Hydroxide
Orthorhombic
A
Alwilkinsite-(Y)
Y(UO₂)₃(SO₄)₂O(OH)₃(H₂O)₇·7H₂O
Sulfate
Orthorhombic
Mohs 2–2.5
Ammineite
CuCl₂·2NH₃
Organic Mineral
Orthorhombic
Mohs 1
Ammoniozippeite
(NH₄)₂[(UO₂)₂(SO₄)O₂]·H₂O
Sulfate
Orthorhombic
Mohs 2.5
Ancylite-(Ce)
CeSr(CO₃)₂(OH)·H₂O
Carbonate
Orthorhombic
Mohs 4–4.5
A
Ancylite-(La)
LaSr(CO₃)₂(OH)·H₂O
Carbonate
Orthorhombic
Mohs 4–4.5
Andalusite
Al₂SiO₅
Silicate
Orthorhombic
Mohs 6.5–7.5
A
Andorite VI
AgPbSb₃S₆
Sulfosalt
Orthorhombic
A
Andreyivanovite
FeCrP
Native Element
Orthorhombic
Anduoite
RuAs₂
Sulfide
Orthorhombic
A
Angarfite
NaFe³⁺₅(PO₄)₄(OH)₄·4H₂O
Phosphate
Orthorhombic
Mohs 2.5
Anglesite
Pb(SO₄)
Sulfate
Orthorhombic
Mohs 2.5–3
Anhydrite
Ca(SO₄)
Sulfate
Orthorhombic
Mohs 3–3.5
Anilite
Cu₇S₄
Sulfide
Orthorhombic
Mohs 3
Anthophyllite
Mg₂Mg₅Si₈O₂₂(OH)₂
Silicate
Orthorhombic
Mohs 5.5–6
A
Antimonselite
Sb₂Se₃
Sulfide
Orthorhombic
Mohs 3.3
Antlerite
Cu²⁺₃(SO₄)(OH)₄
Sulfate
Orthorhombic
Mohs 3.5
Aragonite
Ca(CO₃)
Carbonate
Orthorhombic
Mohs 3.5–4
Arcanite
K₂(SO₄)
Sulfate
Orthorhombic
Mohs 2
Ardennite-(As)
Mn²⁺₄Al₄(AlMg)(AsO₄)(SiO₄)₂(Si₃O₁₀)(OH)₆
Silicate
Orthorhombic
Ardennite-(V)
Mn²⁺₄Al₄(AlMg)(VO₄)(SiO₄)₂(Si₃O₁₀)(OH)₆
Silicate
Orthorhombic
Mohs 6–7
Argyrodite
Ag₈GeS₆
Sulfide
Orthorhombic
Mohs 2.5–3
Armalcolite
(Mg,Fe²⁺)Ti₂O₅
Oxides & Hydroxide
Orthorhombic
Mohs 5
Armenite
BaCa₂(Al₆Si₉)O₃₀·2H₂O
Silicate
Orthorhombic
Mohs 7–8
Arsendescloizite
PbZn(AsO₄)(OH)
Arsenate
Orthorhombic
Mohs 4–5
A
Arsenoclasite
Mn²⁺₅(AsO₄)₂(OH)₄
Arsenate
Orthorhombic
Mohs 5–6
A
Arsenohopeite
Zn₃(AsO₄)₂·4H₂O
Arsenate
Orthorhombic
Mohs 3
Arsenolamprite
As
Native Element
Orthorhombic
Mohs 2
A
Arsenovanmeersscheite
U(UO₂)₃(AsO₄)₂(OH)₆·4H₂O
Arsenate
Orthorhombic
Mohs 2
Arsenuranylite
Ca(UO₂)₄(AsO₄)₂(OH)₄·6H₂O
Arsenate
Orthorhombic
Mohs 2–3
A
Asimowite
Fe₂SiO₄
Silicate
Orthorhombic
Atacamite
Cu₂Cl(OH)₃
Halide
Orthorhombic
Mohs 3–3.5
Athabascaite
Cu₅Se₄
Sulfide
Orthorhombic
Attikaite
Ca₃Cu₂Al₂(AsO₄)₄(OH)₄·2H₂O
Arsenate
Orthorhombic
Mohs 2–2.5
A
Auerbakhite
MnTl₂As₂S₅
Sulfosalt
Orthorhombic
Auriacusite
Fe³⁺Cu²⁺(AsO₄)O
Arsenate
Orthorhombic
Mohs 3
Austinite
CaZn(AsO₄)(OH)
Arsenate
Orthorhombic
Mohs 4–4.5
Autunite
Ca(UO₂)₂(PO₄)₂·10-12H₂O
Phosphate
Orthorhombic
Mohs 2–2.5
Avogadrite
KBF₄
Halide
Orthorhombic
Azoproite
Mg₂[(Ti,Mg),Fe³⁺]O₂(BO₃)
Borate
Orthorhombic
Mohs 5.5
B
Badakhshanite-(Y)
Y₂Mn₄Al(Si₂B₇BeO₂₄)
Silicate
Orthorhombic
Mohs 6.5–7
B
Bahariyaite
KMnO₄
Oxides & Hydroxide
Orthorhombic
Balipholite
LiBaMg₂Al₃(Si₂O₆)₂(OH)₈
Silicate
Orthorhombic
Balkanite
Ag₅Cu₉HgS₈
Sulfide
Orthorhombic
Mohs 3.5
Balyakinite
Cu²⁺(Te⁴⁺O₃)
Oxides & Hydroxide
Orthorhombic
Banalsite
Na₂BaAl₄Si₄O₁₆
Silicate
Orthorhombic
Mohs 6.5
Barberiite
(NH₄)BF₄
Organic Mineral
Orthorhombic
B
Bario-orthojoaquinite
Ba₄Fe²⁺₂Ti₂O₂(SiO₃)₈·H₂O
Silicate
Orthorhombic
Mohs 5.5
B
Barioperovskite
BaTiO₃
Oxides & Hydroxide
Orthorhombic
Barrerite
Na₂(Si₇Al₂)O₁₈·6H₂O
Silicate
Orthorhombic
Mohs 3.5
B
Barylite
BaBe₂Si₂O₇
Silicate
Orthorhombic
Mohs 7
Batisite
Na₂BaTi₂O₂(Si₂O₆)₂
Silicate
Orthorhombic
Mohs 6
Bavenite
Ca₄Be₂₊ₓAl₂₋ₓSi₉O₂₆₋ₓ(OH)₂₊ₓ (x = 0 to 1)
Silicate
Orthorhombic
Mohs 5.5
Becquerelite
Ca(UO₂)₆O₄(OH)₆·8H₂O
Oxides & Hydroxide
Orthorhombic
Mohs 2.5
B
Bederite
Ca₂Mn²⁺₄Fe³⁺₂(PO₄)₆·2H₂O
Phosphate
Orthorhombic
Mohs 5
Behoite
Be(OH)₂
Oxides & Hydroxide
Orthorhombic
Mohs 4
Benyacarite
KTiMn²⁺₂Fe³⁺₂(PO₄)₄OF·15H₂O
Phosphate
Orthorhombic
Mohs 2.5–3
B
Bernalite
Fe(OH)₃
Oxides & Hydroxide
Orthorhombic
Mohs 4
Berthierine
(Fe²⁺,Fe³⁺,Al)₃(Si,Al)₂O₅(OH)₄
Silicate
Orthorhombic
Berthierite
FeSb₂S₄
Sulfosalt
Orthorhombic
Mohs 2–3
Bertossaite
Li₂CaAl₄(PO₄)₄(OH)₄
Phosphate
Orthorhombic
Mohs 6
Bertrandite
Be₄Si₂O₇(OH)₂
Silicate
Orthorhombic
Mohs 6–7
Betekhtinite
(Cu,Fe)₂₁Pb₂S₁₅
Sulfide
Orthorhombic
Mohs 3–3.5
Beyerite
CaBi₂O₂(CO₃)₂
Carbonate
Orthorhombic
Mohs 2–3
B
Bezsmertnovite
(Au,Ag)₄Cu(Te,Pb)
Sulfide
Orthorhombic
Bigcreekite
BaSi₂O₅·4H₂O
Silicate
Orthorhombic
Mohs 2–3
Billietite
Ba(UO₂)₆O₄(OH)₆·8H₂O
Oxides & Hydroxide
Orthorhombic
B
Birchite
Cd₂Cu₂(PO₄)₂(SO₄)·5H₂O
Phosphate
Orthorhombic
Mohs 3.5–4
Bismuthinite
Bi₂S₃
Sulfide
Orthorhombic
Mohs 2–2.5
Bismutite
Bi₂O₂(CO₃)
Carbonate
Orthorhombic
Mohs 2.5–3.5
Bismutocolumbite
BiNbO₄
Oxides & Hydroxide
Orthorhombic
Mohs 5.5
Bismutotantalite
BiTaO₄
Oxides & Hydroxide
Orthorhombic
Mohs 5–5.5
Blatterite
Sb⁵⁺₃Mn³⁺₉Mn²⁺₃₅(BO₃)₁₆O₃₂
Borate
Orthorhombic
Mohs 6
Blixite
Pb₈O₅(OH)₂Cl₄
Halide
Orthorhombic
Mohs 3
B
Blossite
Cu₂V⁵⁺₂O₇
Oxides & Hydroxide
Orthorhombic
B
Bobfinchite
Na[(UO₂)₈O₃(OH)₁₁]·10H₂O
Oxides & Hydroxide
Orthorhombic
B
Bobmeyerite
Pb₄(Al₃Cu)(Si₄O₁₂)(S₀.₅Si₀.₅O₄)(OH)₇Cl(H₂O)₃
Silicate
Orthorhombic
Boggsite
Na₃Ca₈(Si₇₇Al₁₉)O₁₉₂·70H₂O
Silicate
Orthorhombic
Mohs 3.5
B
Bohseite
Ca₄Be₃₊ₓAl₁₋ₓSi₉O₂₅₋ₓ(OH)₃₊ₓ (x = 0 to 1)
Silicate
Orthorhombic
Mohs 5–6
Bonaccordite
Ni₂Fe³⁺O₂(BO₃)
Borate
Orthorhombic
B
Boojumite
Pb₈O₄(OH)₂(S₂O₃)₃
Sulfate
Orthorhombic
Boracite
Mg₃B₇O₁₃Cl
Halide
Orthorhombic
Mohs 7–7.5
B
Boromullite
Al₉BSi₂O₁₉
Silicate
Orthorhombic
Boulangerite
Pb₅Sb₄S₁₁
Sulfosalt
Orthorhombic
Mohs 2.5–3
Bournonite
CuPbSbS₃
Sulfosalt
Orthorhombic
Mohs 2.5–3
Bowieite
Rh₂S₃
Sulfide
Orthorhombic
B
Bowlesite
PtSnS
Sulfide
Orthorhombic
B
Bracewellite
CrO(OH)
Oxides & Hydroxide
Orthorhombic
Brassite
Mg(AsO₃OH)·4H₂O
Arsenate
Orthorhombic
B
Bredigite
Ca₇Mg(SiO₄)₄
Silicate
Orthorhombic
Brenkite
Ca₂(CO₃)F₂
Carbonate
Orthorhombic
Mohs 5
B
Bridgmanite
MgSiO₃
Silicate
Orthorhombic
B
Brontesite
(NH₄)₃PbCl₅
Organic Mineral
Orthorhombic
Brookite
TiO₂
Oxides & Hydroxide
Orthorhombic
Mohs 5.5–6
Brownmillerite
Ca₂Fe³⁺AlO₅
Oxides & Hydroxide
Orthorhombic
B
Buchwaldite
NaCa(PO₄)
Phosphate
Orthorhombic
Mohs 3
B
Buckhornite
(Pb₂BiS₃)(AuTe₂)
Sulfosalt
Orthorhombic
Bulachite
Al₆(AsO₄)₃(OH)₉(H₂O)₄·2H₂O
Arsenate
Orthorhombic
Mohs 2
Burkeite
Na₄(SO₄)(CO₃)
Sulfate
Orthorhombic
Mohs 3.5
Byelorussite-(Ce)
NaBa₂Ce₂Mn²⁺Ti₂Si₈O₂₆(F,OH)·H₂O
Silicate
Orthorhombic
Mohs 5.5–6
B
Byrudite
(Be, )(V³⁺,Ti)₃O₆
Oxides & Hydroxide
Orthorhombic
Mohs 7
B
Bytízite
Cu₃SbSe₃
Sulfosalt
Orthorhombic
Böhmite
AlO(OH)
Oxides & Hydroxide
Orthorhombic
Mohs 3.5
Běhounekite
U(SO₄)₂(H₂O)₄
Sulfate
Orthorhombic
C
Cabriite
Pd₂CuSn
Native Element
Orthorhombic
C
Calamaite
Na₂TiO(SO₄)₂·2H₂O
Sulfate
Orthorhombic
Mohs 3
Calciborite
CaB₂O₄
Borate
Orthorhombic
Mohs 3.5
C
Calcio-olivine
Ca₂(SiO₄)
Silicate
Orthorhombic
Calcioancylite-(Ce)
(Ce,Ca,Sr)(CO₃)(OH,H₂O)
Carbonate
Orthorhombic
Mohs 4–4.5
C
Calcioancylite-(La)
(LaCa)(CO₃)₂(OH)(H₂O)
Carbonate
Orthorhombic
Calcioandyrobertsite
KCaCu₅(AsO₄)₄[As(OH)₂O₂]·2H₂O
Arsenate
Orthorhombic
Mohs 3
C
Calciocatapleiite
CaZrSi₃O₉·2H₂O
Silicate
Orthorhombic
Mohs 4.5–5
C
Calcioursilite
Ca₄(UO₂)₄(Si₂O₅)₅(OH)₆·15H₂O
Silicate
Orthorhombic
Caledonite
Cu₂Pb₅(SO₄)₃(CO₃)(OH)₆
Sulfate
Orthorhombic
Mohs 2.5–3
Calkinsite-(Ce)
Ce₂(CO₃)₃·4H₂O
Carbonate
Orthorhombic
Mohs 2.5
Calumetite
CaCu₄(OH)₈Cl₂·3.5H₂O
Halide
Orthorhombic
Mohs 2
Capgaronnite
AgHgClS
Sulfide
Orthorhombic
Carbocernaite
(Sr,Ce,La)(Ca,Na)(CO₃)₂
Carbonate
Orthorhombic
Mohs 3
C
Cardite
Zn₅.₅(AsO₄)₂(AsO₃OH)(OH)₃·3H₂O
Arsenate
Orthorhombic
Carlosbarbosaite
(UO₂)₂Nb₂O₆(OH)₂·2H₂O
Oxides & Hydroxide
Orthorhombic
Carmeltazite
ZrAl₂Ti₄O₁₁
Oxides & Hydroxide
Orthorhombic
Carminite
PbFe³⁺₂(AsO₄)₂(OH)₂
Arsenate
Orthorhombic
Mohs 3.5
Carnallite
KMgCl₃·6H₂O
Halide
Orthorhombic
Mohs 2.5
Carpholite
Mn²⁺Al₂Si₂O₆(OH)₄
Silicate
Orthorhombic
Mohs 5.5–6
C
Cassagnaite
Ca₄Fe³⁺₄V³⁺₂(OH)₆O₂(Si₃O₁₀)(SiO₄)₂
Silicate
Orthorhombic
C
Catalanoite
Na₂(HPO₄)·8H₂O
Phosphate
Orthorhombic
Cavansite
Ca(V⁴⁺O)(Si₄O₁₀)·4H₂O
Silicate
Orthorhombic
Mohs 3.5–4
C
Cavoite
CaV₃O₇
Vanadate
Orthorhombic
C
Cayalsite-(Y)
CaY₆Al₂Si₄O₁₈F₆
Silicate
Orthorhombic
Mohs 6.5
Caysichite-(Y)
(Ca,Yb,Er)₄Y₄(Si₈O₂₀)(CO₃)₆(OH)·7H₂O
Silicate
Orthorhombic
Mohs 4.5
Celestine
Sr(SO₄)
Sulfate
Orthorhombic
Mohs 3–3.5
Cerromojonite
CuPbBiSe₃
Sulfosalt
Orthorhombic
Cerussite
Pb(CO₃)
Carbonate
Orthorhombic
Mohs 3–3.5
Cervantite
Sb³⁺Sb⁵⁺O₄
Oxides & Hydroxide
Orthorhombic
Mohs 4–5
Cesbronite
Cu₃Te⁶⁺O₄(OH)₄
Oxides & Hydroxide
Orthorhombic
Mohs 3
Chalcocyanite
Cu(SO₄)
Sulfate
Orthorhombic
Mohs 3.5
Chalcomenite
Cu(Se⁴⁺O₃)·2H₂O
Oxides & Hydroxide
Orthorhombic
Mohs 2–2.5
Chalcostibite
CuSbS₂
Sulfosalt
Orthorhombic
Mohs 3–4
Chambersite
Mn₃B₇O₁₃Cl
Halide
Orthorhombic
Mohs 7
Chanabayaite
Cu₂Cl(N₃C₂H₂)₂(NH₃,Cl,H₂O, )₄
Organic Mineral
Orthorhombic
Mohs 2
Chegemite
Ca₇(SiO₄)₃(OH)₂
Silicate
Orthorhombic
Mohs 5.5–6
Chelkarite
CaMgB₂O₄Cl₂·7H₂O
Borate
Orthorhombic
Chenguodaite
Ag₉FeTe₂S₄
Sulfide
Orthorhombic
C
Chenmingite
FeCr₂O₄
Oxides & Hydroxide
Orthorhombic
C
Cheremnykhite
Pb₃Zn₃(TeO₆)(VO₄)₂
Vanadate
Orthorhombic
Cherepanovite
RhAs
Sulfide
Orthorhombic
Chesnokovite
Na₂SiO₂(OH)₂·8H₂O
Silicate
Orthorhombic
Mohs 2.5
C
Chessexite
Na₄Ca₂Mg₃Al₈(SiO₄)₂(SO₄)₁₀(OH)₁₀·40H₂O
Silicate
Orthorhombic
Chesterite
Mg₁₇Si₂₀O₅₄(OH)₆
Silicate
Orthorhombic
Mohs 2.25
Chestermanite
Mg₂(Fe³⁺,Mg,Al,Sb⁵⁺)O₂(BO₃)
Borate
Orthorhombic
Mohs 6
Chiappinoite-(Y)
Y₂Mn(Si₃O₇)₄
Silicate
Orthorhombic
Mohs 6
Chiavennite
CaMn²⁺(BeOH)₂Si₅O₁₃·2H₂O
Silicate
Orthorhombic
Mohs 3
Childrenite
Fe²⁺Al(PO₄)(OH)₂·H₂O
Phosphate
Orthorhombic
Mohs 5
Chivruaiite
Ca₄(Ti,Nb)₅(Si₆O₁₇)₂(OH,O)₅·13-14H₂O
Silicate
Orthorhombic
Chkalovite
Na₂BeSi₂O₆
Silicate
Orthorhombic
Mohs 6
Chlorothionite
K₂Cu(SO₄)Cl₂
Sulfate
Orthorhombic
Mohs 2.5
C
Chromschieffelinite
Pb₁₀Te⁶⁺₆O₂₀(OH)₁₄(CrO₄)(H₂O)₅
Chromate
Orthorhombic
Mohs 2
Chrysoberyl
BeAl₂O₄
Oxides & Hydroxide
Orthorhombic
Mohs 8.5
C
Chukochenite
(Li₀.₅Al₀.₅)Al₂O₄
Oxides & Hydroxide
Orthorhombic
Mohs 8
C
Clerite
MnSb₂S₄
Sulfosalt
Orthorhombic
Cobaltaustinite
CaCo(AsO₄)(OH)
Arsenate
Orthorhombic
Mohs 4.5
Cobaltite
CoAsS
Sulfosalt
Orthorhombic
Mohs 5.5
C
Cohenite
CFe₃
Organic Mineral
Orthorhombic
Mohs 5.5–6
Colimaite
K₃VS₄
Sulfide
Orthorhombic
Group
Columbite
(Fe,Mn)Nb₂O₆
Oxides & Hydroxide
Orthorhombic
Mohs 6–6.5
Columbite-(Fe)
Fe²⁺Nb₂O₆
Oxides & Hydroxide
Orthorhombic
C
Columbite-(Mg)
MgNb₂O₆
Oxides & Hydroxide
Orthorhombic
Columbite-(Mn)
Mn²⁺Nb₂O₆
Oxides & Hydroxide
Orthorhombic
Comancheite
Hg²⁺₅₅N³⁻₂₄(NH₂,OH)₄(Cl,Br)₃₄
Halide
Orthorhombic
Mohs 2
Compreignacite
K₂(UO₂)₆O₄(OH)₆·7H₂O
Oxides & Hydroxide
Orthorhombic
Conichalcite
CaCu(AsO₄)(OH)
Arsenate
Orthorhombic
Mohs 4.5
C
Coparsite
Cu²⁺₄O₂(AsO₄)Cl
Arsenate
Orthorhombic
Mineraloid
Coral
Aragonite skeleton
Carbonate
Orthorhombic
Mohs 3–4
Cordierite
Mg₂Al₄Si₅O₁₈
Silicate
Orthorhombic
Mohs 7–7.5
Cornetite
Cu₃(PO₄)(OH)₃
Phosphate
Orthorhombic
Mohs 4.5
Correianevesite
Fe²⁺Mn²⁺₂(PO₄)₂·3H₂O
Phosphate
Orthorhombic
Mohs 3.5
Cortesognoite
CaV₂Si₂O₇(OH)₂·H₂O
Silicate
Orthorhombic
Cosalite
Pb₂Bi₂S₅
Sulfosalt
Orthorhombic
Mohs 2.5–3
Costibite
CoSbS
Sulfosalt
Orthorhombic
Cotunnite
PbCl₂
Halide
Orthorhombic
Mohs 2.5
C
Coutinhoite
ThₓBa₁₋₂ₓ(UO₂)₂Si₅O₁₃·3H₂O
Silicate
Orthorhombic
Mohs 2
Cowlesite
Ca(Al₂Si₃)O₁₀·5-6H₂O
Silicate
Orthorhombic
Creaseyite
Cu₂Pb₂Fe³⁺₂Si₅O₁₇·6H₂O
Silicate
Orthorhombic
Mohs 2.5
C
Crimsonite
PbFe³⁺₂(PO₄)₂(OH)₂
Phosphate
Orthorhombic
Mohs 3.5
C
Crocobelonite
CaFe³⁺₂O(PO₄)₂
Phosphate
Orthorhombic
Cubanite
CuFe₂S₃
Sulfide
Orthorhombic
Mohs 3.5
C
Cupromolybdite
Cu²⁺₃O(Mo⁶⁺O₄)₂
Oxides & Hydroxide
Orthorhombic
Mohs 3
Curienite
Pb(UO₂)₂(VO₄)₂·5H₂O
Vanadate
Orthorhombic
Curite
Pb₃₊ₓ[(UO₂)₄O₄₊ₓ(OH)₃₋ₓ]₂·2H₂O
Oxides & Hydroxide
Orthorhombic
Mohs 4–5
C
Czochralskiite
Na₄Ca₃Mg(PO₄)₄
Phosphate
Orthorhombic
Mohs 4–5
Damaraite
Pb₃O₂(OH)Cl
Halide
Orthorhombic
Mohs 3
Danburite
CaB₂Si₂O₈
Silicate
Orthorhombic
Mohs 7–7.5
Danielsite
(Cu,Ag)₁₄HgS₈
Sulfide
Orthorhombic
Mohs 2–2.5
D
Daomanite
CuPtAsS₂
Sulfosalt
Orthorhombic
Dawsonite
NaAl(CO₃)(OH)₂
Carbonate
Orthorhombic
Mohs 3
Defernite
Ca₆(CO₃)₁.₅₈(Si₂O₇)₀.₂₁(OH)₇[Cl₀.₅₀(OH)₀.₀₈(H₂O)₀.₄₂]
Silicate
Orthorhombic
Delhayelite
K₇Na₃Ca₅Al₂Si₁₄O₃₈F₄Cl₂
Silicate
Orthorhombic
D
Deliensite
Fe²⁺(UO₂)₂(SO₄)₂(OH)₂·7H₂O
Sulfate
Orthorhombic
Mohs 2
D
Demagistrisite
BaCa₂Mn³⁺₄(Si₃O₁₀)(Si₂O₇)(OH)₄·3H₂O
Silicate
Orthorhombic
Mohs 3.5
Demicheleite-(Br)
BiSBr
Sulfosalt
Orthorhombic
Demicheleite-(Cl)
BiSCl
Sulfosalt
Orthorhombic
D
Demicheleite-(I)
BiSI
Sulfosalt
Orthorhombic
Derriksite
Cu₄(UO₂)(Se⁴⁺O₃)₂(OH)₆
Oxides & Hydroxide
Orthorhombic
Descloizite
PbZn(VO₄)(OH)
Vanadate
Orthorhombic
Mohs 3.5
Dewindtite
H₂Pb₃(UO₂)₆O₄(PO₄)₄·12H₂O
Phosphate
Orthorhombic
Diaspore
AlO(OH)
Oxides & Hydroxide
Orthorhombic
Mohs 6.5–7
Dimorphite
As₄S₃
Sulfide
Orthorhombic
Mohs 1.5
D
Dinite
C₂₀H₃₆
Organic Mineral
Orthorhombic
D
Dioskouriite
CaCu₄Cl₆(OH)₄·4H₂O
Halide
Orthorhombic
D
Direnzoite
NaK₆MgCa₂(Al₁₃Si₄₇)O₁₂₀·36H₂O
Silicate
Orthorhombic
Mohs 4.5
Dittmarite
(NH₄)Mg(PO₄)·H₂O
Phosphate
Orthorhombic
Donpeacorite
(Mn,Mg)MgSi₂O₆
Silicate
Orthorhombic
Mohs 5–6
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