I am not an expert, but, I have researched this and tried my own home ruby heating experiments. One thing I learned is, when they heat treat Rubys, they heat them to the temperature at which they melt but do not liquify, and that temp allows some impurities and inclusions to escape, but it also allows cracks to melt back together. This temperature is held and maintained for day to weeks even months at times. Then they allow them to cool and this process is done extremely slow, sometimes taking weeks to cool down. This is done to prevent cracking or old cracks from reappearing. I tried heating a ruby before I did any research and all I did was destroy the color and turn it into a brittle crumbly piece of junk. I heated it quick with a propane torch and let it cool in the air.
To properly heat treat a sapphire or ruby. The stone must first pass a few questions. Does it have inclusions? Is it broken or fractured? What is the goal of heat treating? The inclusions. These are what gives the stone its color. In rubies, they’re usually black. But can be of any host rock color. Heat treating usually isn’t for removing big inclusions. Is the stone fractured or broken? Heat treating is not a way to fix broken stones. Sorry, don’t know where you heard that. But you cannot remelt corundum to fix broken ones. The reason your stones crack. Isn’t because of the heat necessarily. They were already there. Heat just made the cracks bigger. Allowing your stone to crumble. And last, why don’t want to heat treat? Heat treating is for color enhancing only. It does not melt cracks together. It doesn’t remove large inclusions. Heat treating is only for color. If you’re wondering how I know, I mine them and work with them daily.
@@iiniijewelrycan we lighten deep red ruby with heat treatment if yes how much temperature and time is required to lighten the color .i wanted to lighten color of longido ruby which is too dark but clarity of stone is too good .
@@everdost89 you can brighten it up a little bit yes. The specific temp I do not have at this time. You would have to get ahold of Gem Mountain mine in Philipsburg Montana. They will be able to give you further specifics about individual temps and whether or not a chemical additive may or may not be needed.
@@iiniijewelryso, I have round cut little rubies, 0.20 ct, and are light red ¿can I use this technique to enhance the color? Obviously is an experiment, but I ask you before this attempt 😅
It is very interesting that we can make synthetic rubies and sapphires for industry from powders of alumina oxide and chromium oxide, sapphires only need the alumina oxide powder.
I'd have to think the 2300-2400 F destroying the impurities is the reason that one crumbles. It was full of impurities. The normal treatment for ruby is 1800 C; 3200-3300 F. That's "way above" what you did. And it doesn't make "normal" rubies crumble. (if you went to 2400 C, you went way to hot, and that would possibly be why it fell apart as well...)
Heat treatment is ONLY for color. And should only be done on clean stones with no cracks or fractures. Your stones crumble. Because your heat is too intense too fast and you make the fractures and cracks bigger. But at the same time, propane cannot reach the temps needed to heat treat corundum. You need a special furnace. Like the one we use in Rock Creek here in Montana. Check out videos from them. They have all the info you’ll need to know how to heat treat stones and which are suitable and which are not. Thanks for sharing and good luck 🍀
I'm pretty sure a lot of corundum is dyed, so not only the red color disappears, but more of the fluorescent areas are exposed since the dye cooked off.
UV sounds simple but, there a wide range in UV type light so, more importantly, what is the nm frequency of your light? I suggest using 365nm but maybe rubies are better under a different wave length?
Would it help to put a bit of paper in the crucible and maybe put a lid on it to try and pull the oxygen out? It seemed like maybe the material in the cracks oxidized and swelled.
احب ان اشكرك كثيرا علي عملك الرائع ومعلوماتك المفيده ..اتمني لك المزيد من النجاح والوصول إلي اعلي دراجات العلم في هذا المجال وكل مجال جميل ومفيد ..شكرا
Good day, you know, I would like to see if a hexagonal Ruby looks good already cut and polished. I ask you this question because I don't know where there is a business like this here and I want to bring my own that I have. They are transparent for more than 400 carats and others for less carats. but although these occur. They would be good like Fura Star Ruby
Give minimum not above 1000 degree and 5 minute and give sudden cool use water and after this process several time you got good result 👍 every time you saw improvement the stones 👍
I think what went wrong here is that you overcooked them. I've seen it mentioned in papers before, but if you overheat a gem while treating it you can destroy it, causing it to lessen or even lose it's color and become unstable, just like the rubies here did. perhaps you might have more success treating higher quality corundum's? buying some sapphire gravel from gem mountain might provide a good amount of stones to test on. they usually have a lot bigger of a reaction to treatment :D
I am not an expert, but, I have researched this and tried my own home ruby heating experiments. One thing I learned is, when they heat treat Rubys, they heat them to the temperature at which they melt but do not liquify, and that temp allows some impurities and inclusions to escape, but it also allows cracks to melt back together. This temperature is held and maintained for day to weeks even months at times. Then they allow them to cool and this process is done extremely slow, sometimes taking weeks to cool down. This is done to prevent cracking or old cracks from reappearing. I tried heating a ruby before I did any research and all I did was destroy the color and turn it into a brittle crumbly piece of junk. I heated it quick with a propane torch and let it cool in the air.
To properly heat treat a sapphire or ruby. The stone must first pass a few questions. Does it have inclusions? Is it broken or fractured? What is the goal of heat treating? The inclusions. These are what gives the stone its color. In rubies, they’re usually black. But can be of any host rock color. Heat treating usually isn’t for removing big inclusions. Is the stone fractured or broken? Heat treating is not a way to fix broken stones. Sorry, don’t know where you heard that. But you cannot remelt corundum to fix broken ones. The reason your stones crack. Isn’t because of the heat necessarily. They were already there. Heat just made the cracks bigger. Allowing your stone to crumble. And last, why don’t want to heat treat? Heat treating is for color enhancing only. It does not melt cracks together. It doesn’t remove large inclusions. Heat treating is only for color. If you’re wondering how I know, I mine them and work with them daily.
@@iiniijewelrycan we lighten deep red ruby with heat treatment if yes how much temperature and time is required to lighten the color .i wanted to lighten color of longido ruby which is too dark but clarity of stone is too good .
@@everdost89 you can brighten it up a little bit yes. The specific temp I do not have at this time. You would have to get ahold of Gem Mountain mine in Philipsburg Montana. They will be able to give you further specifics about individual temps and whether or not a chemical additive may or may not be needed.
@@iiniijewelryso, I have round cut little rubies, 0.20 ct, and are light red ¿can I use this technique to enhance the color?
Obviously is an experiment, but I ask you before this attempt 😅
It is very interesting that we can make synthetic rubies and sapphires for industry from powders of alumina oxide and chromium oxide, sapphires only need the alumina oxide powder.
Glad you're back, and with an interesting prospect too.
I'd have to think the 2300-2400 F destroying the impurities is the reason that one crumbles. It was full of impurities. The normal treatment for ruby is 1800 C; 3200-3300 F. That's "way above" what you did. And it doesn't make "normal" rubies crumble. (if you went to 2400 C, you went way to hot, and that would possibly be why it fell apart as well...)
Heat treatment is ONLY for color. And should only be done on clean stones with no cracks or fractures. Your stones crumble. Because your heat is too intense too fast and you make the fractures and cracks bigger. But at the same time, propane cannot reach the temps needed to heat treat corundum. You need a special furnace. Like the one we use in Rock Creek here in Montana. Check out videos from them. They have all the info you’ll need to know how to heat treat stones and which are suitable and which are not. Thanks for sharing and good luck 🍀
I like that they fluoresed better but they seemed to become lighter in color not more transparent
I love finding corundum in western NC, Still a newbie, could you give a quick explanation for heat treatment of Ruby ? Thanks.
Has been a while, nice to see you are still around.
I'm pretty sure a lot of corundum is dyed, so not only the red color disappears, but more of the fluorescent areas are exposed since the dye cooked off.
UV sounds simple but, there a wide range in UV type light so, more importantly, what is the nm frequency of your light? I suggest using 365nm but maybe rubies are better under a different wave length?
How those cracks filled using corundum powder? I need to know , explain the whole process. please
What type of UV light do you use?
hi, friend. question, have you cut and polished a rough ruby?
I have tools for cutting and furnace and vacuum furnace .
Beautiful sharing 😊
Would it help to put a bit of paper in the crucible and maybe put a lid on it to try and pull the oxygen out? It seemed like maybe the material in the cracks oxidized and swelled.
Could be something to try in future tests.
The oven is apparently powerful. How much electricity did it consume?
I thought they did the higher temp heat treatments in an oxygen free environment. Maybe they crumble if you don't? 🤔
احب ان اشكرك كثيرا علي عملك الرائع ومعلوماتك المفيده ..اتمني لك المزيد من النجاح والوصول إلي اعلي دراجات العلم في هذا المجال وكل مجال جميل ومفيد ..شكرا
Where I can heat 2500 C, if you know anyone can do this please let me know. Thank you.
graphite furnace 2400 C
Good day, you know, I would like to see if a hexagonal Ruby looks good already cut and polished. I ask you this question because I don't know where there is a business like this here and I want to bring my own that I have. They are transparent for more than 400 carats and others for less carats. but although these occur. They would be good like Fura Star Ruby
Good, so how can I buy my rock
Give minimum not above 1000 degree and 5 minute and give sudden cool use water and after this process several time you got good result 👍 every time you saw improvement the stones 👍
Hello,
I got a raw ruby stone ,how can I get it get ready about temperature and who can do this job perfectly..........🙏
Where did you get the rubies?
Search "madagascar stone mix". Comes with various types of stones
I try my sapphire stones this can work's 👍 get good shine and craks fill need 100 of time short time heat and sudden cool , that is work's
Beatyful
I think what went wrong here is that you overcooked them. I've seen it mentioned in papers before, but if you overheat a gem while treating it you can destroy it, causing it to lessen or even lose it's color and become unstable, just like the rubies here did.
perhaps you might have more success treating higher quality corundum's? buying some sapphire gravel from gem mountain might provide a good amount of stones to test on. they usually have a lot bigger of a reaction to treatment :D
Chỗ mình phổ biết là có giòng spinel này
Có spinel xanh cobal,spinel red
I'm gonna try this with a different method that I''ll reveal when I post the vid of the results
❤Thunkyou
I’m sure there are other better way to heat treated, I’m myself has been looking in a different way to heat treated .
somebody stole part of this video and did not credit him
Saludos
Maybe if it was clean, it might work alittle better...
රතු කට්ට ඇති තරම් තියනවා අපි ලග ගන්න කවුරු හරි ඉන්නවා නම් එන්න
Yakut kireç taşına dönüşmüş.
I don't know, it just looks like to me. You destroyed them you know what I meani don't really get it I ho
Heated and treated gems are not good for astrology purpose🙏🙏
Corundum; not even close to ruby!
❤❤❤
රුබි ලො කලිටි ඇති තරම් තියනවා
👍 PAKAI LAMPU ULTRA VIOLET MENJADI JELAS WARNANYA.
Give me ruby
so, you destroyed them!
Yikes.
ha ha ha ... this guy doesn't have a bloody clue how to heat treat...😃
❤❤