Red Ruby of 8 carats !!!!!!!!!!

[coolguynamek]

Here''s another collection of red ruby of 8 carats of mine . Previous pink ruby was of 8 carats too. I have scanned it in the scanner and it shows red flourescence too.

 

[coolguynamek]

From back side it looks like this

http://coolguynamek.bravehost.com/backruby4.jpg

 

[strmrdr]

yummy! :}

 

[innerkitten]

Oooooh, I wish I had a ruby like that.

 

[Cave Keeper]

Wow, what a surprize to find out a pink ruby looks scarlet on my tube's screen.

How can I trust what those dealer websites' photos show in terms of color from now on?

No wonder sometimes I couldn't figure out why a website could claim a stone was purplish when it looked red or another stone was greenish when it looked yellow.

Thanks for the education.

 

[valeria101]

Knowing how close to the Holly Grail an 8 carat ruby is... what are these?

Collection of 8 carat rubies sounds awfully nice, I must say. I had just one occasion to see a couple of such stones in the same place - a 5m necklace by a Venice jeweler. Lucky you

 

[Cave Keeper]

Spending the whole weekend trolling all over the net for more facts on gemstones, I think I can explain some aspects of what you have observed.

Probably the scanner uses a lighting device which emits UV rays. The UV rays excite the atoms in some materials, causing fluorescence. Ruby is included as one of such materials.

When the image of your pink ruby was being scanned, the ruby went into a state of 'excitement'; therefore, its color was much redder. The scanner probably took in a hot scarlet image of the ruby as that actually was the color it could detect during the scanning process. The scanner did not 'lie'.

But don't trust me, as I'm not a professional gemologist or any thing close.

 

[purduephotog]

Actually, you're pretty close to why colours don't appear correctly.

Believe it or not an imaging system must be designed based around the OUTPUT medium. A scanner, properly designed, works best when the designer chooses output for the Human Visual System or Computer Monitor. Uusally they make expensive compromises, however.

The biggest problem is the 'cutoff' filters used to detect colour for a digital device don't line up with what the HVS uses to detect colour. This translates to green dresses looking teal, blues looking purple, and (in the worst case) a purple flower looking pink.

UV isn't taken into account in the scanning process- my guess is a fluorescent tube is the lightsource (I'd be surprised otherwise)- LEDs are pretty cheap nowadays but I've only seen them in low end scanners.

There's no easy way to 'fix' the colour of your gem scans other than to place it in sunlight and tweak the iamge until it matches. Or buy a digital camera and shoot it that way.

but again, in any system you use, you aren't going to reproduce the colour exactly correct, and it won't work on my system unless I know how it's on yours...

Probably far too long of a post for this sorta thing but if you ever want to know more give me a shout.

Oh- I work for Kodak so it's not as if I had *that* much free time on my hands....

 

[coolguynamek]

Dear .. Here's again one of my collection of 4.5 carats ruby from backside . I have scanned from my scanner . See how exactly it looks ., theres some blue color shades along with the red. I have got a new pc with XP loaded and hp New scanner to scan my collections of precious gems and show all my friends around the world. I would like to know why this blue color shades are there?

 

[mogok]

Hello,
Some rubies from metamorphic origin like Mong Hsu in Burma, Luc yen in Vietnam, Jagdalek in Afghanistan and I think also Nepal can present some bluish zoning if they are not heat treated. the heat treatment will remove this bluish core and make the stone bright red.
This is one possibility, now some rubies are also slightly purple due to the color or also due to a wrong orientation during the cutting: Rubies are dichoic gems with a purplish ray and an orange one. If due to the travel of the light inside the stone the purplish rays direction is favored then your stone can looks to present from these specific directions some purplish or bluish areas.

Hoping to have helped you,

All the best

 

[valeria101]

----------------
On 7/7/2004 10:48:48 AM mogok wrote:



Some rubies from metamorphic origin like Mong Hsu in Burma, Luc yen in Vietnam, Jagdalek in Afghanistan and I think also Nepal can present some bluish zoning if they are not heat treated.

----------------

This one below has been heated... and the blue core shows a tad more under the camera than in any other viewing conditions, but it does show anywhere.

I was farely convinced that this color pattern is Vietnamese only - but this should be wrong and Mogok right given the common geologic features of all those deposits.

Is there a quick read about what makes this happen ?

 

[mogok]

Hello Ana,

Heat treatment is not all the time a 100% succes.
May be this stone can be still improved with an other heat process? May be not... Cannot really say like that.

All the best,