mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

Mineralpedia Details for Chiavennite

Reset

Chiavennite

Chiavennite

Named for the type locality and only Italian locality at Tanno in Chiavenna, Lombardy. Additional localities for Chiavennite include in several localities in Norway, at the Uto mines in Sweden, and in Madagascar. Chivennite occurs in vugs in syenite pegmatite and as a coating on beryl in pegmatites. Additional associated minerals include bavenite, alancime, aegirine, helvite, eudidymite, natrolite, and feldspar.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/chiavennite.pdf

Formula
CaMn2+(BeOH)2Si5O13ยท2H2
Crystal System
Orthorhombic 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
yellow, orange, red orange 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Hardness
WebMineral
View Chiavennite 
Mindat
View Chiavennite 

Chiavennite from Vevja quarry, Tvedalen, Larvik, Vestfold, Norway

Chiavennite
            from Vevja quarry, Tvedalen, Larvik, Vestfold, Norway

Small piece with a thick coating of bright orange, micaceous micro crystals of Chiavennite, a rare Beryllium zeolite.

Click thumbnail images for larger view.

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2019 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map