Is this Rock a Diamond?

  • Published on Jan 12, 2018
  • I bought a cheap diamond off ebay and I test to see if it really is one.
    water jet cutting diamond:
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Comments • 841

  • Hae Kim
    Hae Kim 8 days ago

    Water zet is the final test to be born as complete precious gem- stones. Skilled Guilds war....

  • asap fannypack
    asap fannypack 12 days ago

    cody slab

  • Aaron Turner
    Aaron Turner 12 days ago

    1:56 it didn't zero out. Am I looking at that right?

  • mac mac aguano
    mac mac aguano 13 days ago

    Do you buy pearl?

  • Anima Bilkent
    Anima Bilkent 19 days ago

    Not Diamond. Only serpantine

  • msprincesss115
    msprincesss115 22 days ago

    i thought you would use it to do a scratch a mirror test..

  • SunRise SunRise
    SunRise SunRise 28 days ago

    So many Emeralds selling on eBay are they real ?

  • radouan bourjal
    radouan bourjal Month ago


  • Fast Desires
    Fast Desires Month ago

    Diamond on ebay for 120 dollars LOL!

  • Gubby
    Gubby Month ago

    Could someone quickly explain how the water volume test works? How does putting something into a glass of water on a scale allow to measure the weight of water displaced if its still in the glass and on the scale?

  • Shah Zaman
    Shah Zaman Month ago

    I sale a blue diamond

  • seededsoul
    seededsoul Month ago

    Why didn’t you check if the sapphire would scratch the diamond?

  • Scarface Reivax
    Scarface Reivax Month ago

    Carbonized crystal poop for sale on ebay

  • Almost God
    Almost God Month ago

    I just had a kidney stone removed ... Let's do a test on that

  • shaan marak
    shaan marak Month ago

    Hi i need your help . n have many pice black stone , i do no what is this..

  • BlinGames
    BlinGames Month ago +1

    I got a diamon for ten dollars. The person thought it was quartz.

  • Memory of the Stars

    I'm as hard as diamond.

  • Carlos Lopez
    Carlos Lopez Month ago

    That Ruby looks like a Jolly Rancher yum

  • Sipun Moharana
    Sipun Moharana Month ago


  • Carlos Espinoza
    Carlos Espinoza Month ago

    God damn look at that fishscale

  • 乡下收古董珠宝的老杨

    Comparing with my meteorite I am selling on TVclip a diamond is nothing!

  • Just Do it
    Just Do it 2 months ago +1

    Mountain rock..hmm

  • jesu conquer
    jesu conquer 2 months ago

    hello Cody!
    I have been interested in an experiment involved in making synthetic diamond. The experiment is kind of famous but i have never seen anyone do it.
    things that are used is a real diamond (very little amount) called a carbon seed.
    Other stuff are also used such a grafite and so on..
    U put it in a microwave though and let it form a bigger diamond from the other elements included.
    i would love if you do read about it and try to do it.
    I am a new fan/subscriber. :)

  • George Alderson
    George Alderson 2 months ago

    I have a gallstone. Does anyone want to buy them to see if it is a diamond? Best offer gets it!

  • Louis Edgar
    Louis Edgar 2 months ago

    Where did you get the diamond on eBay ?

  • Ron Ando
    Ron Ando 2 months ago +1

    I have plenty of can I sell it to eBay...???I have plenty of that kind of diamonds.....

  • Amado Harbov
    Amado Harbov 2 months ago

    not diamond

  • Cmj रंगीलो राजस्थान

    You make a video how to mek home mek pmc silver clay .plz cody

  • nora Hafid
    nora Hafid 2 months ago

    I have the same rock omg

  • Daddy SmokesYams
    Daddy SmokesYams 3 months ago

    Someone sold his dumb ass a rock from their driveway

  • Heather tate
    Heather tate 3 months ago

    I guess no.. it should be like glass

  • Old Man
    Old Man 3 months ago

    Found them allot when i was mining diamonds. We called it *board* diamonds. Used after excavation as pan testers. Or sorting testers.

  • Naresh Kakkad Kakkad
    Naresh Kakkad Kakkad 3 months ago

    Hai mere paas Bhi Hai Asin diamond

  • Atul Rathore
    Atul Rathore 3 months ago


  • lawrence bacus
    lawrence bacus 3 months ago

    sorry to say that your math was off, your answer should have been 3.5123

  • Corin Fink
    Corin Fink 3 months ago

    This is not close to what a common diamond is. The easiest would have been using a diamondtester or cut the stone and use a refraktometer

  • Shuaib Ali Umrani
    Shuaib Ali Umrani 3 months ago

    what did you sho nothing only bak bak bak totaly west of time

  • Daniel Carré
    Daniel Carré 3 months ago

    I think you dont include the volume off the rod in your density.

  • Richard Carew
    Richard Carew 4 months ago

    There is no other mineral as hard as diamond.. diamond density differs depending on the depth of formation.. i find 10, 10+, ++, +++

  • 4 months ago


  • Gregory Taylor
    Gregory Taylor 4 months ago

    Thought that synthetic ruby was a jolly rancher

  • Bhaskar P
    Bhaskar P 4 months ago

    Jelli kalu

  • Surah Fatiha
    Surah Fatiha 4 months ago

    Tu kon hai !

  • Surah Fatiha
    Surah Fatiha 4 months ago

    Namai ekai ba khong o

  • Surah Fatiha
    Surah Fatiha 4 months ago

    Fllow ur lovely dog i never accept u lazy person ur life time servent ur 2 dog!

  • Surah Fatiha
    Surah Fatiha 4 months ago

    i never accept u!

  • Carson Chandler
    Carson Chandler 4 months ago

    I honestly thought the synthetic ruby was a jolly rancher

  • Catherine Mendel
    Catherine Mendel 4 months ago

    Did you know the following three letters are not used in the Periodic Table? J W and Q

  • joseph overmyer
    joseph overmyer 5 months ago


  • Lyon Of Judah
    Lyon Of Judah 5 months ago

    I have a stack of these rocks at my place...

  • cyrina Xia
    cyrina Xia 5 months ago

    IDK 😐 IF DIAMOND 💍 💎

  • ReligionlessFAITH
    ReligionlessFAITH 5 months ago

    you could have heated it to 1000degrees and dropped it in liquid oxygen .. if it burns up and disappears, WAS a diamond!

  • koolkitty8989
    koolkitty8989 5 months ago

    Just barely too dense to be silicon carbide, too, which would be the go-to diamond-like material. (refractive index included) Plus the thermal conductivity isn't nearly as high (though still fairly high, in the ballpark of copper or higher depending on the crystal form), and it's a semiconductor.
    Wait ... diamond should be 2-5 times as thermally conductive at copper near room temperature. So if 'about the same as copper' is the benchmark, silicon carbide would fill most of these qualifications. (it'd need something to bump the density up beyond 3.21 g/cc though)

  • Ahmed Ayaad
    Ahmed Ayaad 6 months ago


  • Ïñœ Õçī
    Ïñœ Õçī 6 months ago

    That is very pure diamond youre rich now..

  • jackson andreea
    jackson andreea 6 months ago

    i have alot stones like this,what name have this stone please

  • nicholas travisano
    nicholas travisano 6 months ago

    which seller was this purchased from ?

  • Bitchy Quotes
    Bitchy Quotes 6 months ago

    More like earwax. 😂😂😂

  • Daniel Ramos López
    Daniel Ramos López 6 months ago

    Is this a diamont? Okay, let's destoy a rubi. Hahahaha

  • v.k ART'S
    v.k ART'S 6 months ago

    Not instead

  • Xealz
    Xealz 6 months ago

    Do more minimg vids

  • LancsLad
    LancsLad 6 months ago

    Frig me, buy a real diamond

  • NetRolller3D
    NetRolller3D 6 months ago

    Suggestion: Put a microwave oven with some graphite in it into your big vacuum chamber, vacuum it down, refill with a mixture of hydrogen and methane, and turn on the microwave. Theoretically, it should deposit diamond on the graphite.

  • Helaman Gile
    Helaman Gile 6 months ago

    I find these all over

  • DrachenSeele
    DrachenSeele 6 months ago

    3.41gram? you should have written π

  • Daniel Lauloo
    Daniel Lauloo 6 months ago

    Omg this is my first time seeing ruby getting scratch

  • zippy
    zippy 6 months ago

    But , it dosn't look like a crystal.

  • Spleghegg
    Spleghegg 6 months ago

    either you got scammed 120 dollars or profited like 300k$

    • Spleghegg
      Spleghegg 6 months ago

      Tyler Swanson please elaborate on what you are trying tell me

    • Tyler Swanson
      Tyler Swanson 6 months ago

      MULE!! Trust me he knows

    • Tyler Swanson
      Tyler Swanson 6 months ago

      MULE!! That's not how this works lol, purity my dude its important

  • Buffalo Valley
    Buffalo Valley 6 months ago

    Best test is rub it on sand paper and if it runs along like soap its a diamond but if their is friction its not. Use the very fine black sand paper

  • Shy Shy Pereda
    Shy Shy Pereda 6 months ago

    Wrong!!!! Hahaha

    • Tyler Swanson
      Tyler Swanson 6 months ago

      Shy Shy Pereda he's almost done with college for this shit, what education do you have in it?

  • Rodny G
    Rodny G 6 months ago

    no this rock isn't a diamond. Diamonds are a solid form of carbon with a cubic crystal structure. This is a rock.

    • Rodny G
      Rodny G 6 months ago

      It's the Philosophy Professor in me :)

    • Tyler Swanson
      Tyler Swanson 6 months ago

      Rodny G Ok, he's VERY educated on the subject then, but you already knew what I meant. So good shit with roundabout way of going at this converstatiom. :D

    • Rodny G
      Rodny G 6 months ago

      I wasn't stating an argument. I was simply pointing out that your question makes no sense.

    • Tyler Swanson
      Tyler Swanson 6 months ago

      Rodny G Good argument lel, I love it when people know what I mean but retort the way I said it instead of actually arguing the point, real classic

    • Rodny G
      Rodny G 6 months ago

      No, nobody graduates collage on a subject. Obviously you've never been to collage.

  • Brent Jung
    Brent Jung 6 months ago

    did you mean lab created ruby or synthetic...because there is a difference

  • ポンスRuben
    ポンスRuben 6 months ago

    Where’s the water jet video? :(

  • 44 annetta hunte.
    44 annetta hunte. 7 months ago


  • Amit Ahuja
    Amit Ahuja 7 months ago

    Do a pycnometer test for density

  • Produce 101 :D
    Produce 101 :D 7 months ago

    I don’t really care what it looks like, I just wanted a large stone to play with...

  • Treyon Daren
    Treyon Daren 7 months ago

    um... just so you know but i doubt that rock is 50% diamond

    • Tyler Swanson
      Tyler Swanson 6 months ago

      Treyon Daren it doesn't matter what you think he's very educated on the subject

  • Richard Robertson
    Richard Robertson 7 months ago

    Cody, I didn't have time to read all 759 comments, so someone may have already suggested this simple test. Place the stone in a cup of water and have it X-rayed (radiographed) at a local veterinarian's office. Vet's are easier to deal with than dentists or M.D.'s for experiments like this. If it is a diamond you would barely be able to see it; if it is a zircon it will stand out like a piece of lead (almost). Interesting video, as usual, Cody.

  • sajjad khan
    sajjad khan 7 months ago

    Sir how to check rough diamond

  • Eliza Von Zeux
    Eliza Von Zeux 7 months ago

    His maths skill is just ridiculous. 😂

  • Ethan VanPutten
    Ethan VanPutten 7 months ago

    Hey Cody how much heat does it take to melt a diamond? Plz tell me.

    • Cody'sLab
      Cody'sLab  7 months ago

      It doesn't melt unless under pressure, carbon sublimates at about 3915 K ​

  • imraan khan
    imraan khan 7 months ago

    Hi sir Iam from India I have many stone like this what is I found in marble blocks inside so I want to show you pls give me an a address

  • hausaffe
    hausaffe 7 months ago

    burn it

  • Mary Udomah
    Mary Udomah 8 months ago

    God damn it not the water jet guys again. Be careful.

  • DAVID 143 SHAH
    DAVID 143 SHAH 8 months ago

    Why don't you use measuring cylinder to measure the volume of that rock.

  • Philip Yankov
    Philip Yankov 8 months ago

    How can I find something like this on eBay? Do you remember the listing name?

  • Mcchuggernaut
    Mcchuggernaut 8 months ago

    Cody man, that diamond isn't "a diamond". There are so many inclusions that it may as well be a piece of sedimentary rock made up of a diamond sand stuck together with a bunch of other crap. It isn't going to behave like a mostly pure diamond crystal lattice of the same size would behave. It will be MUCH weaker than a gem-quality diamond. If you stomp on a piece of sandstone, it will crumble to bits. Try the same thing with a solid quartz crystal (Which sandstone is primarily made of) and you will just break your foot. The water jet might not "cut" that stone, but it WILL blow out all the other junk holding that diamond sand together, either blasting it apart or appearing to "cut" it. Just my two cents for your consideration.

    • Mcchuggernaut
      Mcchuggernaut 6 months ago

      The definition of a diamond: A solid form of carbon with a diamond cubic crystal structure. This "rock" is what you call a "matrix" with diamond inclusions. And you are right, Cody is well educated, and a chemist. But do you know what I am? A computer tech grad with a minor in GEOLOGY. Sit down and shut up, you might learn something. Science is collaborative, and people specialize in different fields because it is impractical to be taught everything about every existing subject. That's why there are electricians, plumbers, and quantum physicists (instead of just generic "smart" or "skilled" people) doing specific jobs they are specially trained for. A physicist may be smart, but I might not want him wiring my house, fixing my toilet, or troubleshooting my computer.

    • Tyler Swanson
      Tyler Swanson 6 months ago

      Mcchuggernaut did he say any of those things ? It's a diamond that's all he said lol. And he's right it is a diamond, he is highly educated on the topic

  • Arun Maddy
    Arun Maddy 8 months ago

    Hey I have that but I don't know about me

  • ΔŘŁØ32
    ΔŘŁØ32 8 months ago +1

    Wait I just realised this is the video my dad showed me.

  • RANT
    RANT 8 months ago

    That's a Carbonado (black diamond). Is less denser than a diamond, that's why you got those numbers. Look it up.

  • ted swanson
    ted swanson 8 months ago

    SMASH it with a hammer and use it to sharpen you'r ax.

  • dragonherald
    dragonherald 8 months ago

    "I wanted a large stone to play with."

  • J ellowpy
    J ellowpy 8 months ago

    Cool collab

  • TheDesertwalker
    TheDesertwalker 8 months ago

    Cody, can you please make flux grown rubies using a calibrated kiln and a platinum crucible? I have always been fascinated by that process. It just seems like a cool thing to do. Thanks.

  • The Rust Admin
    The Rust Admin 8 months ago

    cody, is obsidian as hard as diamond or nowhere near?

  • Follow The Grow
    Follow The Grow 8 months ago

    Dude that could be worth hundreds of thousands of dollars and your just going to cut it? Makes not since you could be cutting thru a flawless sections which in turn would make the diamond lose value

  • nick the thick
    nick the thick 8 months ago

    No *video ends*

  • Da Be
    Da Be 8 months ago

    Myth: Diamonds are rare and therefor extra expensive.
    Thanks Debeers.

  • Robert S. Reilly
    Robert S. Reilly 8 months ago

    Cody, could you make a video attempting to cold weld metal in your vacuum chamber?