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Grandfathered minerals
1,125 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Abernathyite | K(UO₂)(AsO₄)·3H₂O | Tetragonal | — | — |
| Acanthite | Ag₂S | Monoclinic | — | — |
| Adamite | Zn₂AsO₄(OH) | Orthorhombic | 3.5 | 4.23 g/cm³ |
| Adelite | CaMgAsO₄(OH) | Orthorhombic | 5.0 | — |
| Afwillite | Ca₃[SiO₃(OH)]₂·2H₂O | Monoclinic | — | — |
| Aguilarite | Ag₄SeS | Orthorhombic | 2.5 | — |
| Ahlfeldite | NiSeO₃·2H₂O | Monoclinic | — | — |
| Aikinite | CuPbBiS₃ | Orthorhombic | — | — |
| Akrochordite | Mn²⁺₅(AsO₄)₂(OH)₄·4H₂O | Monoclinic | 3.5 | — |
| Alabandite | MnS | Cubic | — | 4.19 g/cm³ |
| Alamosite | PbSiO₃ | Monoclinic | 4.5 | 6.31 g/cm³ |
| Albite | NaAlSi₃O₈ | Triclinic | — | 2.64 g/cm³ |
| Algodonite | Cu₁₋ₓAsₓ (x ~0.15) | — | — | — |
| Alleghanyite | Mn²⁺₅(SiO₄)₂(OH)₂ | Monoclinic | — | — |
| Alloclasite | CoAsS | Monoclinic | — | 6.26 g/cm³ |
| Allophane | Al₂O₃(SiO₂)₁.₃-₂.₀·2.5-3.0H₂O | — | 3.0 | — |
| Almandine | Fe²⁺₃Al₂(SiO₄)₃ | Cubic | 7.5 | 4.30 g/cm³ |
| Alstonite | BaCa(CO₃)₂ | Triclinic | — | — |
| Altaite | PbTe | Cubic | — | 7.94 g/cm³ |
| Aluminite | Al₂SO₄(OH)₄·7H₂O | Monoclinic | — | — |
| Aluminocopiapite | (Al,Mg)Fe³⁺₄(SO₄)₆(OH,O)₂·20H₂O | Triclinic | — | — |
| Alunogen | Al₂(SO₄)₃(H₂O)₁₂·5H₂O | Triclinic | — | — |
| Amarantite | Fe³⁺₂O(SO₄)₂·7H₂O | Triclinic | 2.5 | — |
| Amarillite | NaFe³⁺(SO₄)₂·6H₂O | Monoclinic | — | — |
| Amblygonite | LiAlPO₄F | Triclinic | — | — |
| Amesite | Mg₂Al(AlSiO₅)(OH)₄ | Triclinic | — | — |
| Aminoffite | Ca₃(BeOH)₂Si₃O₁₀ | Tetragonal | — | 2.83 g/cm³ |
| Ammonioborite | (NH₄)₃B₁₅O₂₀(OH)₈·4H₂O | Monoclinic | — | — |
| Anapaite | Ca₂Fe²⁺(PO₄)₂·4H₂O | Triclinic | 3.5 | 2.81 g/cm³ |
| Andalusite | Al₂SiO₅ | Orthorhombic | 7.5 | 3.15 g/cm³ |
| Andersonite | Na₂Ca(UO₂)(CO₃)₃·6H₂O | Trigonal | 2.5 | — |
| Andradite | Ca₃Fe³⁺₂(SiO₄)₃ | Cubic | — | — |
| Anglesite | PbSO₄ | Orthorhombic | — | 6.34 g/cm³ |
| Anhydrite | CaSO₄ | Orthorhombic | 3.5 | 2.98 g/cm³ |
| Ankerite | Ca(Fe²⁺,Mg)(CO₃)₂ | Trigonal | — | 3.00 g/cm³ |
| Annabergite | Ni₃(AsO₄)₂·8H₂O | Monoclinic | — | — |
| Anorthite | CaAl₂Si₂O₈ | Triclinic | — | — |
| Anthoinite | AlWO₃(OH)₃ | Triclinic | — | — |
| Antimony (native) | Sb | Trigonal | 3.3 | 6.66 g/cm³ |
| Aphthitalite | K₃Na(SO₄)₂ | Trigonal | 3.0 | 2.75 g/cm³ |
| Apjohnite | Mn²⁺Al₂(SO₄)₄ * 2₂H₂O | Monoclinic | — | — |
| Aragonite | CaCO₃ | Orthorhombic | 3.8 | 2.93 g/cm³ |
| Aramayoite | Ag₃Sb₂(Bi,Sb)S₆ | Triclinic | 2.5 | — |
| Arcanite | K₂[SO₄] | Orthorhombic | 2.0 | — |
| Ardealite | Ca₂(PO₃OH)(SO₄)·4H₂O | Monoclinic | — | — |
| Argentopyrite | AgFe₂S₃ | Monoclinic | — | — |
| Argyrodite | Ag₈GeS₆ | Orthorhombic | — | 6.20 g/cm³ |
| Armangite | Mn²⁺₂₆As³⁺₁₈O₅₀(CO₃)(OH)₄ | Trigonal | — | — |
| Armenite | BaCa₂(Al₆Si₉)O₃₀·2H₂O | Orthorhombic | — | 2.76 g/cm³ |
| Arsenic (native) | As | Trigonal | 3.5 | 5.68 g/cm³ |
| Arseniosiderite | Ca₂Fe³⁺₃O₂(AsO₄)₃(H₂O)₂·H₂O | Monoclinic | 4.5 | — |
| Arsenoclasite | — | Orthorhombic | — | — |
| Arsenolamprite | As | Orthorhombic | 2.0 | — |
| Arsenolite | As₂O₃ | Cubic | 1.5 | — |
| Arsentsumebite | — | Monoclinic | — | — |
| Arsenuranylite | Ca(UO₂)₄(AsO₄)₂(OH)₄ * 6H₂O | Orthorhombic | — | — |
| Artinite | Mg₂CO₃(OH)₂·3H₂O | Monoclinic | 2.5 | — |
| Asbolane | Mn⁴⁺(O,OH)₂·(Co,Ni,Mg,Ca)ₓ(OH)₂ₓ·nH₂O | Hexagonal | — | — |
| Astrophyllite | K₂NaFe²⁺₇Ti₂Si₈O₂₈(OH)₄F | Triclinic | 3.0 | — |
| Atacamite | Cu₂Cl(OH)₃ | Orthorhombic | — | — |
| Atelestite | Bi₂(AsO₄)O(OH) | Monoclinic | — | — |
| Augelite | Al₂PO₄(OH)₃ | Monoclinic | — | — |
| Aurichalcite | (Zn,Cu²⁺)₅(CO₃)₂(OH)₆ | Monoclinic | 2.0 | — |
| Auricupride | AuCu₃ | Cubic | — | 12.35 g/cm³ |
| Aurostibite | AuSb₂ | Cubic | — | 9.57 g/cm³ |
| Austinite | CaZnAsO₄(OH) | Orthorhombic | — | 4.32 g/cm³ |
| Autunite | Ca(UO₂)₂(PO₄)₂·(10-12)H₂O | Orthorhombic | — | — |
| Avicennite | Tl₂O₃ | Cubic | — | — |
| Avogadrite | KBF₄ | Orthorhombic | — | 2.63 g/cm³ |
| Awaruite | Ni₃Fe | Cubic | — | — |
| Azurite | Cu₃(CO₃)₂(OH)₂ | Monoclinic | 3.8 | 3.75 g/cm³ |
| Babingtonite | Ca₂(Fe,Mn)FeSi₅O₁₄(OH) | Triclinic | — | — |
| Baddeleyite | ZrO₂ | Monoclinic | 6.5 | 5.78 g/cm³ |
| Banalsite | Na₂BaAl₄Si₄O₁₆ | Orthorhombic | — | 2.95 g/cm³ |
| Bandylite | Cu[B(OH)₄]Cl | Tetragonal | 2.5 | — |
| Bararite | (NH₄)₂SiF₆ | Trigonal | — | 2.01 g/cm³ |
| Barbosalite | Fe²⁺Fe³⁺₂(PO₄)₂(OH)₂ | — | 6.0 | — |
| Barysilite | Pb₈Mn²⁺[Si₂O₇]₃ | Trigonal | — | — |
| Barytocalcite | BaCa(CO₃)₂ | Monoclinic | — | — |
| Bassanite | CaSO₄·0.5H₂O | Monoclinic | — | — |