20 Comments
@MatSciMinded 11 years ago
"I'll just put this fire out with my bare foot..."
@Rodanite600 11 years ago
How come you left out the finished product, Ruby with heat treatment applied? You start with a bag of rubies but they disappear somewhere during the video.
@ThePortalNC 13 years ago
You had better test any " Rubies " you buy from this company. I had a sapphire tested by them and they were pretty shady. I still never got my GIA report. Which reminds me I have to go now to make a report for GIA
@DalokiMauvais 10 years ago
Makes me wonder if the ruby in my ring was NOT heat treated. It isn't red at all, more pink-magenta. I don't much like it, but it was a gift. I wouldn't have purchased it for myself. I read that untreated rubies are worth more than treated ones, but I doubt that applies to retail rings with small stones like mine. I'd definitely have preferred a red stone. On the other hand, it IS shiny, so maybe it's just an inferior stone.
@aestheticdust 14 years ago
Thank you for camera advise, a lightbox should also be necessary. Anyway I am planning to get them cut expertly.
@Cujucuyo 14 years ago
A good DSLR with Macro Lens and tripod will do the job. The Canon T3i [USA] also known as 600D [Europe] and KissX5 [Japan] is a great starter DSLR for under $700.
@oldmanfromscenetwentyfour8164 3 years ago
So at what Temp and Time for a single 240 carat Ruby? I have one and I'd like to clear it up.
@treasurehunters5245 11 years ago
Star Rutilated Quartz is natural untreated gemstone. And top quality Star Rutilated Quartz is more beautiful than Ruby.
@dhu_al-fareed 2 years ago
how gemologists tell the differences between natural mined ruby that was heated by nature before it was extracted from mine from natural mined ruby that was heated by human after it was extracted from mine?... or perhaps there was never any record of the first type of ruby?
@hasslefree1848 7 years ago (edited)
Using gas fired furnace equipment for heating rubies can be effective enough. Depending on the source of material and other factors while electric furnaces capable of 1700 to 1750 degrees Celsius are more efficient and more effective.
Some sources of Ruby can be heated to up to 1800 degrees Celsius and the color improves all the more so while the clarity improves relative to the elimination of the Milkiness or Sleepiness seen in the material.
That milky looking effect is caused by the formation of Rutile crystallization within the corundum.
The crystallization occurs because of the trace mineral Titanium dioxide been present during the formation of the Corundum.
In some Ruby sources the sleepiness is easily removed at lower temperatures of 1300 to 1400 degrees Celsius.
Some source ruby material needs temperatures as high as 1800 degrees Celsius to completely remove the milky effect.
But, many sources of Ruby will turn more purple color when heated above 1200 degrees Celsius because the Titanium that is present reacts to the heat and develops a Blue color component and seen after burning.
In the end, and after heating you have more of a purple color sapphire and usually a dark tone also.
With such material the violet or purple secondary color can be eliminated at lower temperatures but when you heat the material at higher temperatures to eliminate the milkiness you will witness an increasing percent of the material turning more violet or decidedly purple color.
That being the case it becomes a conflict of sorts burning to improve the color while the milkiness is not effectively removed or burning at higher temperatures to eliminate the milkiness but witness a notable percent of the rubies turning a vary degree of purple color ( which is actually blue color development ) and mixing with the red base color ( primary color ) creating a obvious purple color.
Some sources turn completely blue and dark blue and can turn black.
Some sources of Ruby can be heated to up to 1800 degrees Celsius and the color improves all the more so while the clarity improves relative to the elimination of the Milkiness or Sleepiness seen in the material.
That milky looking effect is caused by the formation of Rutile crystallization within the corundum.
The crystallization occurs because of the trace mineral Titanium dioxide been present during the formation of the Corundum.
In some Ruby sources the sleepiness is easily removed at lower temperatures of 1300 to 1400 degrees Celsius.
Some source ruby material needs temperatures as high as 1800 degrees Celsius to completely remove the milky effect.
But, many sources of Ruby will turn more purple color when heated above 1200 degrees Celsius because the Titanium that is present reacts to the heat and develops a Blue color component and seen after burning.
In the end, and after heating you have more of a purple color sapphire and usually a dark tone also.
With such material the violet or purple secondary color can be eliminated at lower temperatures but when you heat the material at higher temperatures to eliminate the milkiness you will witness an increasing percent of the material turning more violet or decidedly purple color.
That being the case it becomes a conflict of sorts burning to improve the color while the milkiness is not effectively removed or burning at higher temperatures to eliminate the milkiness but witness a notable percent of the rubies turning a vary degree of purple color ( which is actually blue color development ) and mixing with the red base color ( primary color ) creating a obvious purple color.
Some sources turn completely blue and dark blue and can turn black.
@gma617 13 years ago
Heat treating is a very common practice very very few stones ever bought and sold arent treated in this manner. Lead filling decreases the value and is a shady practice
@CosmicChannel9 14 years ago
400 - 500 c does nothing. The heat treatment has to dissolve the titanium rutile which melts @ 1600 C to improve clarity of the stone. What they are doing @ 500 c is glass filling the rubies w/ leaded glass. It's a common treatment that makes them look ok until you dip them in vinegar or citric acid