Photos of Minerals.
Acanthite
Ag
2S
Acanthite (cooled Argentite)Ag
2S
Actinolite crystals
Ca
2(Mg
4.5-2.5Fe
2+0.5-2.5)Si
8O
22(OH)
2
Actinolite
Ca
2(Mg
4.5-2.5Fe
2+0.5-2.5)Si
8O
22(OH)
2
Adamite
Zn
2AsO
4OH
Adventurine (Quartz)
SiO
2
Agates (Quartz)
SiO
2
Almandine
Fe
2+3Al
2Si
3O
12
Amethyst crystals
SiO
2
Amethyst (polished)
SiO
2
Anhydrite
CaSO
4
Apophyllite
(K,Na)Ca
4Si
8O
20(F,OH)·8H
2O
Aquamarine (Beryl)
Be
3Al
2Si
6O
18
Aragonite
CaCO
3
Aragonite Crystal
CaCO
3
Arfvedsonite
[Na][Na2][(Fe
2+)
4Fe
3+][(OH)
2|Si
8O
22]
Arsenopyrite
FeAsS
Aurichalcite (light blue)
(Zn,Cu)
5[(OH)
3|CO
3]
2
Autunite
Ca(UO
2)
2(PO
4)
2·10-12H
2O
Axinite
Ca
2Fe
2+Al
2BOSi
4O
15(OH)
Azurite
Cu
3(CO
3)
2(OH)
2
Azurite (crystals)
Cu
3(CO
3)
2(OH)
2
Babingtonite on Prehnite and Quartz
Ca2(Fe,Mn)FeSi
5O
14(OH)
Barite
BaSO
4
Barite "rose"
BaSO
4
Benitoite
BaTiSi
3O
9
Borax
Na
2B
4O
7·10H
2O
Bornite (aka Chalcopyrite/Peacock Ore)
CuFeS
2
Boulangerite
Pb
5Sb
4S
11
Bukovskyite
Fe
2(AsO
4)(SO
4)(OH)·7H
2O
Calcite crystal
CaCO
3
Calcite (blue)
CaCO
3
Calcite (orange)
CaCO
3
Calcite (yellow)
CaCO
3
Cassiterite w/Golden Calcite
SnO
2
Cavansite
Ca(VO)Si
4O
10·4(H
2O)
Celestite
SrSO
4
Cerussite
PbCO
3
Chabazite
(Ca,K
2,Na
2)
2[Al
2Si
4O
12]
2·H
2O
Chalcanthite
CuSO
4·5H
2O
Chalcocite
Cu
2S
Chalcopyrite
CuFeS
2
Chondrodite with Phlogopite in Marble
Mg
5(SiO
4)
2F
2
Chrysoberyl (Alexandrite)
BeAl
2O
4
Chrysocolla
Cu
2-xAl
x(H
2-xSi
2O
5)(OH)
4·
nH
2O
Chrysoprase (green chalcedony)
SiO
2
Cinnabar
HgS
Clinohedrite
CaZn(SiO
4)·H
2O
Conichalcite
CaCu(AsO
4)(OH)
Cordierite (aka Iolite)
(Mg,Fe)
2Al
4Si
5O
18
Corundum
Al
2O
3
Covellite
CuS
Creedite
Ca
3Al
2(SO
4)(F,OH)
10·2(H
2O)
Cubic Zirconia
ZrO
2
Cuprite
Cu
2O
Cuprosklodouskite
Cu(UO
2)
2(HSiO
4)
2·6(H
2O)
Cyanotrichite (dark blue)
Cu
4Al
2[(OH)
12|SO
4]·2H
2O
Cylindrite
Pb
3Sn
4FeSb
2S
14
Danburite
CaB
2(SiO
4)
2
Datolite
CaBSiO
4(OH)
Descloizite
(Pb,Zn)
2VO
4OH
Diopside
MgCaSi
2O
6
Dioptase
Cu
6Si
6O
18·6H
2O
Dioptase
Cu
6Si
6O
18·6H
2O
Dioptase
Cu
6Si
6O
18·6H
2O
Dolomite (crystal)
CaMg(CO
3)
2
Dumotierite
Al
7BO
3(SiO
4)
3O
3
Elbaite Tourmaline
Na(Li
1.5Al
1.5)Al
6Si
6O
18(BO
3)
3(OH)
4
Emerald
Be
3Al
2(SiO
3)
6
Epidote
Ca
2A
l2(Fe
3+;Al)(SiO
4)(Si
2O
7)O(OH)O
Epidote crystals
Ca
2A
l2(Fe
3+;Al)(SiO
4)(Si
2O
7)O(OH)O
Erythrite
Co
3(AsO
4)
2·8H
2O
Erythrite
Co
3(AsO
4)
2·8H
2O
Euclase
BeAlSiO
4(OH)
Euclase
BeAlSiO
4(OH)
Feldspar Crystal (aka Orthoclase)
KAlSi
3O
8
Ferridravite
NaFe
3+3(Mg
2Fe
3+4)(Si
6O
18)(BO
3)
3(OH)
3O
Fire Opal
SiO
2·
nH
2O
Flint (Quartz)
SiO
2
Fluorite (aka Fluorspar)
CAF
2
Fluorite (aka Fluorspar)
CAF
2
Fluorite Crystal
CAF
2
Fuchsite
K(Al,Cr)
2(AlSi
3O
10)(OH)
2
Gedrite
Mg
2(Mg
3A
l2)(Si
6A
l2)O
22(OH)
2
Glauberite
Na
2Ca(SO
4)
2
Graphite
C
Gypsum (Fibrous - "Satin Spar")
CaSO
4·2H
2O
Gypsum Crystal
CaSO
4·2H
2O
Gyrolite (balls) on Prehnite
NaCa
16(Si
23Al)O
60(OH)
8·14H
2O
Halite
NaCl
Halite
NaCl
Hausmonnite
2+Mn
3+2O
4
Heliodor (Beryl)
Be
3Al
2Si
6O
18
Hematite
Fe
2O
3
Hematite crystals
Fe
2O
3
Hemimorphite
Zn
4Si
2O
7(OH)
2·H
2O
Hemimorphite
Zn
4Si
2O
7(OH)
2·H
2O
Hollandrite
Ba(Mn
4+6Mn
3+2)O
16·H
2O
Hyalite
SiO
2
Hydrozincite
Zn
5(CO
3)
2(OH)
6
Iron Pyrite
FeS
2
Iron Pyrite ("sun")
FeS
2
Jarosite
KFe
3(SO
4)
2(OH)
6
Jasper (Quartz)
SiO
2
Jeremejevite
Al
6B
5O
15(F,OH)
3
Kyanite
Al
2SiO
5
Labradorite
(Ca, Na)(Al, Si)
4O
8
Labradorite (polished)
(Ca, Na)(Al, Si)
4O
8
Laumontite on Heulandite
Ca(AlSi
2O
6)
2·4H
2O, (Ca,Na)
2-3Al
3(Al,Si)
2Si
13O
36·12H
2O
Lepidolite (with Rubellite crystal)
K(Li,Al)
3(Al,Si,Rb)
4O
10(F,OH)
2
Maganocalcite (with Kutnahorite)
(Ca,Mn)CO
3
Magnetite
Fe
3O
4
Magnetite crystals
Fe
3O
4
Malachite (botyroidal)
Cu
2CO
32
Malachite (polished)
Cu
2CO
32
Malachite (silky)
Cu
2CO
32
Manganvesuvianite
Ca
19Mn
3+(Al,Mn
3+,Fe
3+)
10(Mg,Mn
2+)
2(Si
2O
7)
4(SiO
4)
10O(OH)
9
Marialite (Scapolite)
Na
4(Al
3Si
9O
24)Cl
Metatorbernite
Cu(UO
2)
2(PO
4)
2·8(H
2O)
Molybdenite
MoS
2
Muscovite
KAl
2(AlSi
3O
10)(F,OH)
2
Natrolite
Na
2Al
2Si
3O
10·2H
2O
Nephrite jade
Ca
2(Mg,Fe)
5Si
8O
22(OH)
2
Neptunite
KNa
2Li(Fe
2+, Mn
2+)
2Ti
2Si
8O
24
Okenite
CaSi
2O
5·2H
2O
Olivenite
Cu
2AsO
4OH
Olivenite
Cu
2AsO
4OH
Olmiite
CaMn[SiO
3(OH)](OH)
Orpiment
As
2S
3
Pentagonite
Ca(VO)Si
4O
10·4(H
2O)
Phosgenite
(PbCl)
2CO
3
Picturestone (Jasper [Quartz])
SiO
2
Prehnite (with gyrolite balls)
Ca
2Al(AlSi
3O
10)(OH)
2
Pitchblende (aka Uraninite)
UO
2
Purpurite
Mn
3+PO
4
Pyrargyrite
Ag
3SbS
3
Pyromorphite
Pb
5(PO
4)
3Cl
Pyrope (garnet)
Mg
3Al
2(SiO
4)
3
Pyrophillite
Al
2Si
4O
10(OH)
2
Quartz (polished)
SiO
2
Quartz point
SiO
2
Realgar crystals
AsS
Rhodochrosite
SiO
2
Rose Quartz (polished)
MnCO
3
Rubellite crystal (on Lepidolite)
Na(Li
1·5Al
1·5)Al
6(Si
6O
18)(BO
3)
3(OH)
3(OH)
Ruby (Corundum)
Al
2O
3
Rutile
TiO
2
Rutile (twinned, reticulated)
TiO
2
Sarcopside with Graphtenite
(Fe
2+,Mn
2+,Mg)
3(PO
4)
2
Scapolite
Na
4(Al
3Si
9O
24)Cl
Scorodite
FeAsO
4·2H
2O
Scorzalite
(Fe
2+,Mg)Al
2(OH,PO
4)
2
Sapphire (Corundum)
Al
2O
3
Scolecite
CaAl
2Si
3O
10·3H
2O
Seraphenite (Clinochlore)
(Mg,Fe)
3(Si,Al)
4O
10(OH)
2·(Mg,Fe)
3(OH)
6
Serpierite, Andalusite, Linarite, Anglesite
Ca(Cu,Zn)
4(SO
4)2(OH)
6, Al
2SiO
5, PbCu[(OH)
2|SO
4], PbSO
4·3H
2O
Shattuckite
Cu
5(SiO
3)
4(OH)
2
Shattuckite
Cu
5(SiO
3)
4(OH)
2
Siderite with Kaolinite
FeCO
3
Skutterudite
CoAs
3
Spessartine (Garnet)
Mn
2+3Al
2(SiO
4)
3
Spessartine (Garnet)
Mn
2+3Al
2(SiO
4)
3
Spessartine (Garnet)
Mn
2+3Al
2(SiO
4)
3
Sphaerocobaltite crystals
CoCO
3
Sphalerite crystals
(Zn,Fe)S
Spinel, Black (on diopside)
MgAl
2O
4
Shattuckite
Cu
5(SiO
3)
4(OH)
2
Spinel, Red
MgAl
2O
4
Stibnite
Sb
2S
3
Stilbite
Na
2CaAl
2Si
6O
16·
6H
2O
Sugilite
KNa
2(Fe,Mn,Al)
2Li
3Si
12O
30
Sylvanite
(Ag,Au)Te
2
Tiger's Eye (Quartz)
SiO
2
Topaz
Al
2SiO
4(F,OH)
2
Torbernite
Cu(UO
2)
2(PO
4)2·12H
2O
Tourmaline (schorl)
NaFe
3Al
6Si
6O
18(BO
3)
3(OH)
3OH
Tremolite crystals
Ca2(Mg
5.0-4.5Fe
2+0.0-0.5)Si
8O
22(OH)
2
Turquoise
CuA
l6(PO
4)
4(OH)
8·4H
2O
Ulexite
NaCaB
5O
6(OH)
6·5H
2O
Vanadinite
Pb
5(VO
4)
3Cl
Vanadinite
Pb
5(VO
4)
3Cl
Variscite
AlPO
4·2H
2O
Vesuvianite
Ca
10(Mg,Fe)
2Al
4(SiO
4)
5(Si
2O
7)
2(OH,F)
4
Vivianite
Fe
2+Fe
2+2(PO
4)
2·8H
2O
Wavellite
Al
3(PO
4)
2(OH,F)
3·5H
2O
Willemite
Zn
2SiO
4
Wulfenite
PbMoO
4
Wulfenite (yellow)
PbMoO
4
Yttrocrasite-Y & Yttrobetafite-Y
(Y,Th,Ca,U)(Ti,Fe)
2(O,OH)
6 and (Y,U,Ce)
2(Ti,Nb,Ta)
2O
6(OH)
Zincite (crystals)
(Zn,Mn)O
Zoisite (Tanzanite)
Ca
2Al
3(SiO
4)(Si
2O
7)O(OH)
Zircon
ZrSiO
4