Montesommaite

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Class : Silicates
Subclass : Tectosilicates
Crystal system : Orthorhombic
Chemistry : (K,Na)₉Al₉Si₂₃O₆₄ 10H₂O
Rarity : Very rare

Montesommaite is an extremely rare zeolite, known only in the scoria of Mount Somma, the precursor volcano of Vesuvius (Italy), where it accompanies dolomite, calcite, chabazite and natrolite. It takes its name from this. Montesommaite occurs in colorless bipyramid crystals of 2 mm maximum, so rare that all its physical characteristics could not be measured.

Main photo : Twinned Montebrasite from Ponte do Piaui claim, Piaui valley, Taquaral, Itinga, Jequitinhonha valley, Minas Gerais, Brazil

Montesommaite in the World

Montesommaite is only known at Mount Somma near Naples (Italy) at the San Vito, Pollena and Trapolino quarries.

Right photo : Montesommaite of Mount Somma, Naples, Italy © Stephan Wolfsried

Montesommaite in France

Montesommaite is not known in the French underground.

Twinning

No twin known for this mineral species.

Fakes and treatments

No fakes recorded for this mineral species.

Hardness : Undetermined
Density : 2.34
Fracture : Undetermined
Streak : White

TP : Translucent to transparent
RI : 1.498 to 1.507
Birefringence : 0.009
Optical character : Biaxial -
Pleochroism : None
Fluorescence : None

Solubility : -

Magnetism : NoneRadioactivity : None

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A B C D E F G H I J K L M N O P Q R S T U V W X Y ZBy classes By crystal systems By chemistry Mineral listMinerals for sale Encyclopedia Glossary

MONTESOMMAITE

Montesommaite in the World

Twinning

Fakes and treatments

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
By classes By crystal systems By chemistry Mineral list
Minerals for sale Encyclopedia Glossary