The Montreal Gem and Mineral Show is happening at the end of the month in the main convention center (Le Palais des Congrès).

No guarantee of fantastic #Tugtupite or #Kyanite samples, but many others for sure. There's always a good representation of Canadian and Quebec localities.

#MinCup25 #Montreal #Quebec #Canada #MontSaintHilaire #Grenville #Minerals

Repost from last year: A titanite lozenge imaged both using a cellphone through the microscope ocular, and with a proper imaging system. It's surrounded mostly by quartz (+feldspar).
Likely from the Grenville, but from a teaching collection two generations of retired professors ago.

Titanite can be part of the record of temperature, pressure, and timing of crystallization.

#MinCup25 #Titanite #Grenville #Canada

Repost from last year:
I've seen sphene! (Sounds better than "the rock is tippsy with titanite")

Centimeter-size black sphene (titanite) with apatite (dark brown) and orthoclase feldspar (light brown). Folding pocket knife for scale.

From the Bancroft locality in Ontario, Canada. Grenville-aged (~1.2± billion years)

#MinCup25 #Titanite #Sphene #Bancroft #Ontario #Geology #Grenville

Quebec has industrial quantities of kyanite -although I don't think any are being mined today. They're in the Grenville, the roots of the Himalayan-scale mountains formed over a billion years ago. The screenshot below is from MinDat: https://www.mindat.org/locentries.php?p=14009&m=2303

The Ministère has an awkwardly translated page "Mineral Substances in Quebec" that includes Kyanite in its list of wealth:
https://gq.mines.gouv.qc.ca/portail-substances-minerales_en/

#MinCup25 #Kyanite #Quebec #Grenville #PlateTectonics #Minerals