Idiochromatic Color
Some minerals are nearly always the same color due to their composition and crystal structure. Their color is caused by the absorption or refraction of light of particular wavelength dependant on the individual crystal structure. Cu-minerals are nearly always blue or green, Fe-minerals red, Sulfur yellow and Mn-minerals pink.
Dioptase
Cyclosilicates
CuSiO2(OH)2
Altyn Tube, Kazakhstan & Africa
Size: 10cm
Chrysocolla
Phyllosilicates
(Cu,Al)2H2Si2O5(OH)4．nH2O
Guangdong, China
Size: 10x9 cm
Malachite
Carbonates
Cu2CO3(OH)2
China
Size: 9x6 cm
Malachite
Carbonates
Cu2CO3(OH)2
Congo, Africa
Size: 7cm
Smithsonite
Carbonates
ZnCO3
New Mexico, USA
Size: (Right) 6x6 cm / (Left) 10 cm
Rosasite
Carbonates
(Cu,Zn)2CO3(OH)2
Durango, Mexico
Size: 10 cm
Green Mica: Fuchsite
Phyllosilicates
K(Al,Cr)3Si3O10(OH)2
Brazil
Size: 11cm
Pink Mica: Alurgite
Phyllosilicates
K2(Mg,Al)4-5(Al,Si)8O20(OH)4
Minas Gerais, Brazil
Size: 10x8 cm
Purple Mica: Lepidolite
Phyllosilicates
K(Li,Al)2(Si,Al)4O10(F,OH)2
South Dakota, USA
Size: 10cm
Diopside (var. Violane)
Inosilicates
CaMg[Si2O6]
Val d' Aosta, Italy
Size: 9x3 cm
Azurite
Carbonates
Cu3(CO3)2(OH)2
Guangdong, China
Size: (Left) 8x7 cm / (Right) 7x6 cm
Azurite
Carbonates
Cu3(CO3)2(OH)2
Arizona, USA
Size: (Right) 7cm
Azurite
Carbonates
Cu3(CO3)2(OH)2
Size: 7cm
Malachite & Azurite
Carbonates
Cu2CO3(OH)2 & Cu3(CO3)2(OH)2
Nimo Copper Mine, Tibet
Size: 11 & 13 cm
Linarite
Sulphates
PbCu(SO4)(OH)2
New Mexico, USA
Size: 10cm
Sulphur
Native elements
S
Louisiana, USA
Size: 12x9 cm
Manganocalcite
Carbonates
(Ca,Mn)CO3
New South Wales, Austrialia
Size: 10cm
Rhodonite
Inosilicates
MnSiO3
Montana, USA
Size: 10 cm
Rhodochrosite
Carbonates
MnCO3
Catamarca, Argentina
Size: 13x7.5 cm
Rhodochrosite
Carbonates
MnCO3
Chalkidikki, Greece
Size: 10 cm