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AEGIRINE AKERMANITE
ANALCIME ANDRADITE ANORTITE APATITE ARAGONITE AUGITE BADDELEYITE
BIOTITE CALCITE CANCRINITE CLINOHUMITE COTUNNITE CONDRODITE
CUSPIDINE DANALITE DAVYNE DIOPSID (green) DIOPSID (yellow)
DOLOMITE FAYALITE FLUORITE FORSTERITE FUCHSITE GALENA
GROSSULAR HAUYNITE HEMATITE HYDRODOLOMITE HORNEBLENDE
HYORDTHALITE HUMITE INDIALITE KALIOPHILITE LAZURITE LEUCITE
LUDWIGITE MAGNETITE MARIALITE MEIONITE MELILITE MERLINOITE
MICROSOMMITE MORDENITE NEPHELINE PERICLASE PEROWSKITE
PHILLIPSITE PHLOGOPITE PSEUDOCOTUNNITE QUARZ REALGAR
SANIDIN SARCOLITE SODALITE SODALITE (blue)
SODALITE(green) SODALITE (pink) SPINEL (black) SPINEL
(green) SPINEL (purple) TENORITE TITANITE THOMSONITE
VESUVIANITE VOLBORTHITE WOLLASTONITE ZIRCON (pink) ZIRCON (blue)
All microspecimens
display at least xxs of one species, often of more.
Most of the crystals are well formed, fresh and shiny, and for several
species are gemmy. However ,expectedly:
Forsterite and Periclase are slightly rough, Tenorite blades are
very thin.
The extremely rare sarcolite has rounded form.
Lazurite is xx, but the size of microxx in the blue aggregate is
very small.
Also Pseudocotunnite is small, althogh rich, and mixed with some
Cotunnite.
Indialite xx are small, but gemmy.
Identification is substantially sure for all species, but note:
i) in the Vesuvius area a rock fragment can bear anyone of
the three listed humite group species. If one identifies one xx
of a particular species, i.e. humite, or clinohumite, or chondrodite,
he is not really sure that another similar xx does not pertain to the
other two types.
ii) Similarly, only an X-ray check makes absolutely certain to
distinguish between davyne and microsommite. Nepheline is less
tricky.
You should possibly find Pyrochlore around the Baddeleyite xxs.
Zeolites are on a leucotephrite matrix, other minerals (Baddeleyte,
Hyordthalite, Zircon, glass-clear Sodalite) on sanidin.
Most of the other xxs are found in ejected fragments of
metamorphosed calkstone.
Volborthite, very small xx, was found in vugs in 1631 lava.
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