Corundum is an incredibly useful material for calibrating powder x-ray diffractometers, and you can get NIST SRM 1976c for this purpose.

it is also heavily used in making high temperature sample holders and about a billion other applications in science and chemistry.

vote corundum

#mincup #mincup2023 #mineralcup #mineralcup2023

@MineralCup that is a cruel and unusual match-up. (I voted for #Moissanite because I feel like chaos this year.) #mineralcup2023 #mincup23

My glee that @MineralCup is over here ehehehehe!

(Tho with split presence I do see why they're trying to hold voting on their website this year.)

#mineralcup2023 is almost here!