The dicroscope

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is used to examinate colored stones, either cut or rough.


The instrument is built around a calcite, equiped with a loup and an opening at each end. The calcite divides the lightray into two polarised rays. Therefore you observe two images of your stone. By simple comparison you detect basic cristallographical information of the tested mineral.

You place the mineral in front of the instrument and direct it toward a light source. Then you compare the two images. Make sure to observe the mineral in different directions.

  Both images stay identical this means that the mineral is isotropic, amorphous or micro cristallic.

  When you observe two different colors then the mineral is double refracting and belongs to the group of uniaxial cristallic systems.

 
 
If you see three different colors, in fact two at a time, then the mineral is double refracting and belongs to the group of biaxial cristallic systems.

These results allow to arrange your mineral within the following 3 groups of crystallographic structure:

one single color
isotropic



cubic
amorphous
micro cristallic
Analcime
Cubic Zirkonia
Cuprit
Diamond
Djevalite
Fabulite
Fluorite
Gahnite
Garnet
        Almandine
        Andradite
        Demantoide
        Grossulare
        Hessonite
        Melanite
        Pyrope
        Rhodolite
        Spessartite
        Tsavorite
        Uvarovite

Hauyne
Melanite
Periklas
Pollucite
Sphalerite
Spinel
YAG
Amber
Opal
        Fireopal
Glass
        Moldavite
        Obsidian
        Tektite

Agate
        Aventurine
        Calcedony
        Carneol
        Chrysoprase
        Moosagate
   
two colorsthree colors
anisotropic / doubly refracting
uniaxial

tetragonal
hexagonal
trigonal
biaxial

orthorhombic
monoclinic
triclinic
Anatase
Apophyllite
Skapolite
Vesuvianite
Wulfenite
Zircon
Apatite
Benitoite
Beryl
        Aquamarine
        Bixbit
        Goshenite
        Heliodor
        Morganite
        Emerald

Zinkite
Calcite
Dioptase
Corundum
        Ruby
        Sapphire

Phenakite
Quartz
        Amethyst
        Ametrine
        Rockcrystal
        Smoky Quartz
        Citrine

Rhodochrosite
Turmaline
        Dravite
        Indigolite
        Rubellite
Andalusite
Anglesite
Cerussite
Chrysoberyl
        Alexandrite
Enstatite
Hemimorphite
Kornerupine
Cordierite
Peridot
Phrenite
Sinhalite
Topaz
Zoisite
        Tanzanit
Azurite
Diopside
Epidote
Euclase
Feldspar
        Amazonite
        Labradorite
        Mikroklin
        Moonstone
        Orthoclase
        Oligoclase
        Sunstone
        Sanidine

Clinohumite
Petalite
Spodumen
        Kunzite
        Hiddenite

Staurolite
Titanite
Vivianite
Amblygonite
Axinite
Disthene, Cyanite
Ulexite

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