Donnayite Group, Thorbastnäsite
Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
Sony Nex 7, bellows, Mitutoyo BD Plan 20x SL, stack shot
The yellow xls are a Donnayite group member, the white xls could be Thorbastnaesite.
Result of a discussion with Laszlo Horvath.
© Stephan Wolfsried December 2013