Any corundum without trace elements is colorless. Corundum with trace chemical impurities makes the gems we know. Chromium gives the red to rubies, sapphire has iron and titanium, you can get other colors using vanadium or different ratios. Gems are neat.
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Types of corundum maybe but I think that’s a stretch. Sapphire is (usually) blue Al2O3. Ruby is red Al2O3. Transparent aluminum is Al2O27N5.
Scotty would be proud.
teft@startrek.websiteto
Showerthoughts@lemmy.world•The word Unicorn is uni-corn, as in one corn(horn).
19·2 years agoWait until you hear about bicycles.
The last one should be spelled beau if you mean your special guy.
teft@startrek.websiteto
World News@lemmy.ml•Train manufacturer intentionally bricks trains serviced by independent service providers
37·3 years agoSounds like Poland is going to have to nationalize a train manufacturer.
teft@startrek.websiteto
World News@lemmy.ml•Cop28 president says there is ‘no science’ behind demands for phase-out of fossil fuels
83·3 years agoSultan Ahmed Al Jaber, CBE is an Emirati politician who the Minister of Industry and Advanced Technology of the United Arab Emirates, head of the Abu Dhabi National Oil Company (ADNOC), and chairman of Masdar.
Emphasis mine.
That’s the first line from his wikipedia.
teft@startrek.websiteto
New Communities@lemmy.world•For all your travel questions related to France : VisitingFranceEnglish
31·3 years agoIs the community going to be nice to English speaking people or are they going to pull the usual French snobbery?
teft@startrek.websiteto
Science@lemmy.ml•The bilingual brain may be better at ignoring irrelevant information
32·3 years agoIf you want to really sound like a spanish speaker say it like hijueputas. In english I’d transcibe it like ee-hway-POO-tahs. It sounds way more rude like that.
teft@startrek.websiteto
Science@lemmy.ml•The bilingual brain may be better at ignoring irrelevant information
10·3 years agoThis study considers me monolingual since I never learned my second language in a classroom and. I learned it as an adult. So…I guess fluency doesn’t count. Que grosero.
teft@startrek.websiteto
Technology@lemmy.ml•YouTube is reportedly slowing down videos for Firefox users
332·3 years agoThe delay also does not trigger just once; it is reportedly triggered every time YouTube links are opened in a new tab.
This part got me yesterday as I was listening to music. I loaded a new video in a tab and the other tab waited 5 seconds. I thought I had paused it or something but nope, every time you load a new tab it delays all the other tabs by 5 seconds.
teft@startrek.websiteto
Space@beehaw.org•Why You Don't Actually Want to Live on Mars with Dr. Kelly and Zach Weinersmith - Factually!
4·3 years agoHeat death of the pizza roll universe.
teft@startrek.websiteto
World News@lemmy.ml•Israel’s opposition leader calls on Netanyahu to resign over Hamas attack
36·3 years agoHe won’t though. He’ll say something like “now is not the time for changes as we are at war”.
teft@startrek.websiteto
Space@beehaw.org•Why You Don't Actually Want to Live on Mars with Dr. Kelly and Zach Weinersmith - Factually!
8·3 years agoHere’s why I don’t want to live on mars:
Limited supply of pizza rolls.
teft@startrek.websiteto
World News@lemmy.ml•Man crushed to death by robot in South Korea
11·3 years agoDo they not have tag out/lock out there? Why was the robot even able to move without a laser curtain or something to shut it off if a human got too close?
teft@startrek.websiteto
World News@lemmy.ml•Neo-Nazis walk free from court, spared further jail time over attack on Victorian hikers
4·3 years agoAs someone who has to learn the grammatical gender of nouns I feel for you. I’m constantly fucking up in my second language.
teft@startrek.websiteto
World News@lemmy.ml•This is political persecution’: Israel cracks down on internal critics of its Gaza war
9·3 years agoI believe the term is ethnic cleansing or genocide.
/c/risa is family.
teft@startrek.websiteto
Showerthoughts@lemmy.world•If Jesus is the son of God and Satan is the oposite of God, a literal antichrist would be Satan's father, which would be God since God gave life to Satan
6·3 years agobottleofchips figured it out? bottleofchips? This is a real low point. Yeah, this one hurts.








Definitely a net positive. My friend and I were discussing something similar the other day. He rides motos and I ride downhill and we both learned via youtube. What used to be restricted to people who could afford private lessons or coaching are now available to people even in third world countries. It’s opened up a lot of new horizons for people.