Bill MinarikTitanite encircling illmenite in an amphibolite-facies metabasalt.
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.
Thor bites masked fascist goonsLovely sphene, wonderful spheeene!
Lovely sphene, wonderful spheeene!
Sphene!
Sphene!
Sphene!
Sphene!
#MinCup25 #titanite #kosmochlor
RE: https://bsky.app/profile/did:plc:r6drdfmf5fzdtvuacnfmfiga/post/3lzcmyy75bs2u
RE: https://bsky.app/profile/did:plc:r6drdfmf5fzdtvuacnfmfiga/post/3lzcmyy75bs2u
Mineral Cup & Ore Cup#MinCup25 Round 2 Match 5: We’re going for namesake-minerals as bright meteorite-derived green #kosmochlor is up against the wedge-shaped indicator mineral #titanite.
Vote: https://www.mineralcup.org/2025/vote/r2m05
Results: https://www.mineralcup.org/2025/results/r2m05
Vote: https://www.mineralcup.org/2025/vote/r2m05
Results: https://www.mineralcup.org/2025/results/r2m05
Reposted from bsky:
A hand-ground section of tephrite from Kaiserstuhl Volcanic Complex showing #Titanite
dlwGarnets swimming in a beautiful sea of #Titanite, as seen with a petrographic microscope in plane and cross polarized light, Franciscan Complex, California. The garnets in the field of view are nearly completely surrounded by titanite. Photo by Sarah Brandt. #MinCup25
#Titanite twinning as seen under plane and cross polarized light with a petrographic microscope in a metamorphic rock from the Franciscan Complex, California. Field of view about 2 mm. Photo by Sarah Brandt. #MinCup25
AlexStrekeisen.it (run by Alessandro Da Mommio) has some beautiful thin section images of titanite:
https://www.alexstrekeisen.it/english/pluto/titanite.php
#MinCup25 #ThinSectionThursday #Titanite #Sphene #Granite #Mineralogy
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
#MinCup25 Round 1 Match 11: It's a pair of T-minerals with as versatile #Titanite faces off against the home of rare earth elements #Thortveitite.
VOTE: https://www.mineralcup.org/2025/vote/r1m11
Check results: https://www.mineralcup.org/2025/results/r1m11
