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Amorphous minerals

No long-range crystal structure.

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18 minerals · Amorphous minerals
MineraloidAmber specimen
Amber C₁₀H₁₆O (fossil resin)
Organic MineralAmorphousMohs 2–2.5
MineraloidObsidian specimen
Obsidian SiO₂-rich volcanic glass
SilicateAmorphousMohs 5–5.5
Angastonite specimen
Angastonite CaMgAl₂(PO₄)₂(OH)₄·7H₂O
PhosphateAmorphousMohs 2
Chrysocolla specimen
Chrysocolla (Cu₂₋ₓAlₓ)H₂₋ₓSi₂O₅(OH)₄·nH₂O
SilicateAmorphousMohs 2–4
Delvauxite specimen
Delvauxite CaFe³⁺₄(PO₄)₂(OH)₈·4-5H₂O
PhosphateAmorphousMohs 3.5
Evansite specimen
Evansite Al₃(PO₄)(OH)₆·8H₂O
PhosphateAmorphousMohs 3–4
MineraloidJet specimen
Jet C — fossilized wood
Organic MineralAmorphousMohs 2.5–4
Lechatelierite specimen
Lechatelierite SiO₂
SilicateAmorphous
Limonite specimen
Limonite FeO(OH)·nH₂O
Oxides & HydroxideAmorphousMohs 4–5.5
Manganbelyankinite specimen
Manganbelyankinite Mn²⁺(Ti,Nb)₅O₁₂·9H₂O
Oxides & HydroxideAmorphousMohs 2–3
Metastibnite specimen
Metastibnite Sb₂S₃
SulfideAmorphousMohs 2–3
Neotocite specimen
Neotocite (Mn,Fe)SiO₃·H₂O
SilicateAmorphousMohs 3–4
Pitticite specimen
Pitticite [Fe,AsO₄,SO₄,H₂O]
ArsenateAmorphousMohs 2–3
RockPumice specimen
Pumice Vesicular volcanic glass
SilicateAmorphousMohs 5–6
Santabarbaraite specimen
Santabarbaraite Fe³⁺₃(PO₄)₂(OH)₃·5H₂O
PhosphateAmorphous
T
Tritomite-(Ce) Ce₅(SiO₄,BO₄)₃(OH,O)
SilicateAmorphousMohs 5.5
Yttrotantalite-(Y) specimen
Yttrotantalite-(Y) (Y,U,Fe²⁺)(Ta,Nb)(O,OH)₄
Oxides & HydroxideAmorphousMohs 5–5.5
Zaratite specimen
Zaratite Ni₃(CO₃)(OH)₄·4H₂O
CarbonateAmorphousMohs 3.5