186 FLUORESCENT MINERALS
Zinc ore
This specimen contains willemite,
franklinite, and calcite, displaying
green, black, and pink respectively.
It also contains zincite, which
does not fluoresce.Calcite
The columnar crystals of this specimen
fluoresce blue-white. Trace elements in
calcite can cause other fluorescent colours.Manganoan calcite
Many types of calcite
fluoresce, including this one
from Arizona, USA.Scapolite
This specimen from
Canada is fluorescent,
but not all scapolite
has this quality.Gypsum on rock groundmass
Fluorescence is common in
gypsum; this specimen from Paris,
France, fluoresces a rich yellow.Benitoite
This specimen from California,
USA, turns blue under shortwave
UV light, as seen here.Aragonite
This specimen from Sicily,
Italy, fluoresces pink. Aragonite
material can also fluoresce
yellow, blue, or green.186-187_FEA_Fluorescent_minerals.indd 186 19/05/2016 14:44