#lapidary #gemcutting
Diamonds suck: https://diamondssuck.com/
A little less than 40 minutes left to go. Which mineral will win? Vote, vote, vote! #MinCup23 #Moissanite #Kaolinite
Just letting everyone know that I voted for #Moissanite in the first round of #MinCup23 mostly because I saw a lot of support for its rival that shall not be named and I'm a contrarian by nature.
@TarkabarkaHolgy It looks like #Kaolinite fans are #MinCup veterans who started their campaign strong (some even early to recruit support over the last few days!), while #MinCup23 newbie #moissanite took longer to find fans outside those who have worked with it before
We're into the final few hours of voting in the first match of #MinCup23
Who will be the first mineral to go through to Round 2? It's looking close at the moment. Cast your vote here: https://www.mineralcup.org/2023/campaigns/campaigns/campaigns/round-1-match
Check which mineral is in the lead here: https://www.mineralcup.org/results/round-1-match-1
#moissanite #kaolinite
I'm usually #TeamKittyLitter , for obvious reasons, but this time I think it's going to have to be star dust - #Moissanite - for round 1 #MinCup23
@MineralCup
Not sure what to vote for in match 1 of #MinCup23? Here's a summary:
#Moissanite
SiC
Name: after Henri Moissan, who discovered it in Canyon Diablo Meteorite
Natural occurrence: as presolar grains in meteorites; in kimberlites (origin: Earth's mantle)
Neat fact: changes color when heated
#Kaolinite
Al2(Si2O5)(OH)4
Name: derived from Gaoling, China
Natural occurrence: widespread weathering product of Al-Si minerals
Neat fact: used in prehistoric times for pottery
https://www.mineralcup.org/2023/campaigns/campaigns/campaigns/campaigns/round-1-match
The slippery slurry is ahead! Have the star stuff fans been snuffed? If you haven’t voted yet, there’s still plenty of time. #MinCup23 #Moissanite #Kaolinte
Vote here: https://www.mineralcup.org/2023/campaigns/campaigns/campaigns/campaigns/round-1-match
Results here: https://www.mineralcup.org/results/round-1-match-1
We have #Moissanite crystals that formed in other stars! Dissolve some meteorites almost completely, and some of the residue is SiC -these grains have carbon and silicon isotopes produced in red giant stars and supernova; from before our solar system formed. See Larry Nittler's (now at Arizona State University #ASU) presentation:
https://www.oca.eu/images/LAGRANGE/EcolesThematiques/Houches_2017/pdf/5a_Presolar_grains_Nittler.pdf
#MinCup23 #Cosmochemistry #Stardust
I used to have a set of #kaolinite dinnerware, but now it's just mullite. #Moissanite can take the heat -up to 2500°C. #MinCup23
Going with #Kaolinite against #Moissanite for this first mineral cup round! With having a few cats I’m definitely in favor of the absorbing mineral. #mincup23
Vote: https://www.mineralcup.org/2023/campaigns/campaigns/campaigns/round-1-match-1
Current results: https://www.mineralcup.org/results/round-1-match-1
Main page: https://www.mineralcup.org/
It's the most wonderful time of the year...and by that I mean it's time to geek out about rocks for the next month!
Welcome to #MinCup23!
Vote here:
https://www.mineralcup.org/2023/campaigns/campaigns/campaigns/round-1-match
@doktrock It’s happening right NOW! #MinCup23 #moissanite #kaolinite
Vote: https://www.mineralcup.org/2023/campaigns/campaigns/campaigns/round-1-match
See Results: https://www.mineralcup.org/results/round-1-match-1
Is it the synthetic form of star stuff, or the slippery, soothing slurry? Make your choice and VOTE NOW! #MinCup23 #moissanite #kaolinite
Vote here: https://www.mineralcup.org/2023/campaigns/campaigns/campaigns/round-1-match
Results here: www.mineralcup.org/results/roun...
The first commercial LEDs were based on synthetic #Moissanite. 3H-SiC was used for yellow LEDs in and 6H-SiC was found to emit blue light. Unfortunately, SiC has an indirect bandgap, therefore nowadays, the more favorable GaN is used, which has a direct band gap and is about 100 times brighter. #MinCup23
I'll start some early campaigning for #Moissanite, because synthetic #Moissanite (SiC) is also super-interesting from a materials science perspective #MinCup23
Natural #Moissanite has a huge color variation from green and blue to black depending on composition. It was first identified in 1904 by Henri Moissan in a sample from the Canyon Diablo meteorite found near Barringer Crater.