yellow and smoky
dark and purple
Through
depend on the position they occupy in the crystalline structure of each mineral
Chromophores
Main chromophore elements
copper (Cu)
cobalt (Co)
titanium (Ti)
manganese (Mn)
iron (Fe)
chromium (Cr)
When light is transmitted through a mineral
If it does not absorb any length
The mineral is colorless
It is produced
Another type of idiochromic mineral
electron transfers between different ions
trivalent iron ores
Mineral fine powder color
Name: Karen Dayanna Molina Rincón
Class Name: Mineralogy and Crystallography
Impurities in the crystal lattice
Under the microscope
between
THE COLOR OF MINERALS
Three main groups
Pseudochromatic Minerals
False colors
Variable color and unique mineral property
bright reflections of labradorite
Precious opal
Allochromatic Minerals
Other colors
Variable and unpredictable property
Impurities
Rose on quartz
yellow in Heliodor (spodumene)
blue on Amazonite (orthoclase)
Idiochromic Minerals
Own color
Constant and predictable component
malachite green
red cinnabar
Blue azurite
To describe the color
Methods continue to be developed
colors of metals or alloys
Copper red (native copper)
Brass yellow (chalcopyrite)
Steel gray (molybdenite)
Tin white (Arsenopyrite)
Comparative evaluation
with "color standards" of minerals
Emerald green
Vermilion red
with the color of some commonly known object or substance
Blood red
Lemon yellow
Green apple
Indigo blue
Distinction
Color of minerals
In individual crystals and mineral chunks
Color of a mineral
streak
In polished sections
In reflected light
In thin sections
Transparent
Metallic and covalent compounds
Native metals, sulfides and their analogues
Fundamental absorption band
cuprite
orpiment
cinnabar
Optical Interzonal Electron Transfers and Related Reflection Maxima
Metallic shades (Gold)
Metallic shades (Pyrite)
Associated with transition metal ions
Chrysolite
Rhodonite
Rubelite
Ruby
Emerald
Caused by radioactivity
natural ionizing radiation
formation of color centers of electron holes
calcite
Quartz
fluorite
halite
Importance
Mineral identification
provides information
Genetics of minerals
Crystallochemical characteristics
Main qualitative characteristic
Semi precious stones
Gems
