https://www.edelsteine-neuburg.de
https://www.mineral-bosse.de
https://www.mineralbox.biz
http://www.spessartit.de/walldorf.html
https://www.mineraliengrosshandel.com
'._('einklappen').'
 

Hulsite - Huanggang

Collectors Summary

Chemical Formula (Fe2+,Mg)2(Fe3+,Sn)BO5
Color schwarz
Streak color schwarz
Hardness (Mohs) 3
Solubility +++ HCl, HF
Crystal System monoklin, P2/m