![trifilite del Brasile](https://www.patrickvoillot.com/wp-content/uploads/2021/03/triphyllite-bresil41-150x150.png)
![sturmanite a taglio smeraldo](https://www.patrickvoillot.com/wp-content/uploads/2021/03/sturmanite-taille-emeraude52-300x202.png)
sturmanite
![](https://www.patrickvoillot.com/wp-content/uploads/2021/04/zoom-in.png)
![](https://www.patrickvoillot.com/wp-content/themes/astra-child/images/icon-image.png)
CARATTERISTICHE CHIMICHE
Ca6(Fe,Al,Mn)2[SO4]2 B(OH)4(OH)12 - 25(H2O)
solfato complesso
![](https://www.patrickvoillot.com/wp-content/uploads/2021/04/zoom-in.png)
![](https://www.patrickvoillot.com/wp-content/themes/astra-child/images/icon-image2.png)
CARATTERISTICHE FISICHE
Colore principale
giallo
Altri colori
arancione, verde
Colore della polvere
giallo
Lucentezza
grasso, vetroso
Durezza
2.5 a 0.0
Densità
1.85 a 0.00
Sfaldatura
perfetto
Frattura
irregolare
![](https://www.patrickvoillot.com/wp-content/uploads/2021/04/zoom-in.png)
![](https://www.patrickvoillot.com/wp-content/themes/astra-child/images/icon-image3.png)
PROPRIETÀ OTTICHE
Trasparenza
traslucido, trasparente
Rifrangenza
1.500 - 1.505
Birifrangenza
0.005
molto debole, uniasse positiva
Sdoppiamento
no
Pleocroismo
molto debole
Numero di colori
2
verde chiaro, verde giallo
Fluorescenza
nulla
![](https://www.patrickvoillot.com/wp-content/uploads/2021/04/zoom-in.png)
![](https://www.patrickvoillot.com/wp-content/themes/astra-child/images/icon-image4.png)
PROPRIETÀ DEI CRISTALLI
biterminati pseudo esagonali
![](https://www.patrickvoillot.com/wp-content/uploads/2021/03/cristal-sturmanite.gif)
Sistema critallino
trigonale
![](https://www.patrickvoillot.com/wp-content/uploads/2021/04/zoom-in.png)
![](https://www.patrickvoillot.com/wp-content/themes/astra-child/images/icon-image5.png)
ALTRE INFORMAZIONI
![](https://www.patrickvoillot.com/wp-content/uploads/2021/04/zoom-in.png)
![](https://www.patrickvoillot.com/wp-content/themes/astra-child/images/icon-image6.png)
Pietre simili
Luogo di estrazione
Raro minerale, si trova nel Kalahari in Sudafrica, in Russia nel Caucaso.
Utilizzo in gioielleria
si taglia unicamente per collezione perche’ molto fragile
Venez visitez
notre site web
voillot-joaillier.fr
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