Champagne diamond gives off mostly red dispersion?

[beaujolais]

I just bought a .45 champagne diamond. When it does its dispersive colors, It gives off red about 90 percent of the time. Rarely it will throw off a blue or rainbow type color.

Is that how champagnes are?

It is a pretty amber/lt. brown color, probably a C3/4. It's a nice color but poorly cut - big table, short crown. Oh, and it's set in a filigree type setting that does allow some light to get to the sides.

Ideas or input? Thanks.

 

[Rockdiamond]

Congratulations sonomacounty!

Many brown diamonds have a lot of "subtones"- and some of these sub tones are among the most rare colors in diamonds, if they were pure.
The two that I love ( and am referring to) are orange and red.

The term "champagne" is like the term "hottie"- it can mean so many different things- but there is no set definition.

Natural browns can go from very faint, to incredibly deep.
Sometimes the most deep ones lack some of the fire and sub tones you are seeing.
When I look at cut, judging brown diamonds requires a different outlook, compared to judging the cut of colorless diamonds..
Sometimes they are cut way outside the "norm" for colorless diamonds, with amazing results.
This can include higher depths, and larger tables.

 

[beaujolais]

Ah, Rock - thanks so much !

"Sometimes they are cut way outside the "norm" for colorless diamonds, with amazing results.
This can include higher depths, and larger tables"

Oh, I didn't even think about that. I guess I've been programmed, over the years, to think small table & high crown in my sleep. Is the thinking something like - the small table and high crown that can give a diamond life can hamper color because it causes too much "action" or something or the sort?

Comments are welcome on the photo.

(It looks better in person than in the photo. It has no grey tones, pretty good sparkle and is more the lighter color that you see near the girdle.)

Would you call that a C3/4, btw?

Thanks so much.

Sonoma
another alternative diamond lover

 

[Rockdiamond]

You're welcome!

It's an interesting juxtaposition- which gets me in hot water here all the time. Since I've looked at so many unconventional stones that I really love, I have no fear of considering stones that might rejected if one was looking by depth table combo
When you look at colorless round diamonds, you're handcuffed to certain proportions.
Might a 65% depth G color round look good?
It would, in all likelihood look small for it's weight.

But when I look at brown rounds, that sort of thing takes a much lower priority.
Knowing how difficult it is to photograph browns, I'd say yours look purty durn nice from that photo- I know it's much nicer in person.

I could not tell much about the color from the photo- I'm going by your written impressions.

 

[beaujolais]

Thanks again, David ! Very much.

 

[ChunkyCushionLover]

Thanks again, David ! Very much.

Sonoma,

I question whether what you are seeing is a primary function of the cut more likely the absorption/luminesence properties of the material.

Judging from the photograph I'd say the red you are seeing is not exclusively dispersion and you would be best posting your question in the colored gem forum as they will better capable of a more comprehensive answer.

 

[Rockdiamond]

You're totally welcome Sonoma!

ccl. what is your problem?

 

[MustangGal]

I had that ring put together for me a couple years ago, and remember that stone. To me it almost had a bronze/metalic sheen. While I liked it, I decided I prefer the lighter champagnes. I think you're the 4th owner now? Congrats and I hope you enjoy it!

 

[beaujolais]

Thanks CCL. Makes sense.

(I so love PS / PSers. You get some education here !)

Ah, Mustang, I was wondering where I could find you. I was about to put a shout out to you in Hangout, in fact.

Mustang:

Fourth owner? Wow. I don't see myself parting with it, ever.

Say, do you know where this stone came from (geography wise and seller wise)? Would you say it has fluorescence? I put my UV light on it in a dark closet and I think it does. (I'm a little unsure of judging fluorescence sometimes, unless it's something crazy obvious like how heated rubies look like red light bulbs in the UV and when my violet sapphire goes neon red in the UV light).

And, I love the setting.

Know what's kinda fun - to get to wear a diamond that your co-workers don't realize is a diamond. It bypasses anyone's comments but I still get to play with the subtle dispersion in the high-hat lighting when I get a second.

Thanks all.

 

[LD]

I have a number of "champagne" and brown diamonds. The good ones are highly dispersive and yes, you will often see red and orange flashes. With one of mine I get blue, green and yellow as well as the red and orange! It's like a little private firework display. On another that's more of a chocolate brown, I only see red and orange (not much else).

I have one however that doesn't perform well at all. It's a very light champagne and it looks steely grey in some lights and isn't the most attractive of diamonds. There's very little dispersion in that one!

I think it depends on the colour, depth of colour and cut of the diamond as to how it performs.

 

[MustangGal]

Thanks CCL. Makes sense.

(I so love PS / PSers. You get some education here !)

Ah, Mustang, I was wondering where I could find you. I was about to put a shout out to you in Hangout, in fact.

Mustang:

Fourth owner? Wow. I don't see myself parting with it, ever.

Say, do you know where this stone came from (geography wise and seller wise)? Would you say it has fluorescence? I put my UV light on it in a dark closet and I think it does. (I'm a little unsure of judging fluorescence sometimes, unless it's something crazy obvious like how heated rubies look like red light bulbs in the UV and when my violet sapphire goes neon red in the UV light).

And, I love the setting.

Know what's kinda fun - to get to wear a diamond that your co-workers don't realize is a diamond. It bypasses anyone's comments but I still get to play with the subtle dispersion in the high-hat lighting when I get a second.

Thanks all.

I actually bought the stone from the same place you bought the ring. It was in a cheap Tiffany mount in a large size (9 I think), about 3 years ago? The girl had used it as her e-ring, but I don't know where she got it from originally. She was in the US, but that's all I remember, sorry! I never checked for flor, but it wouldn't suprise me if it glowed orange or some other odd color. I had it sitting around for a few months before purchasing the Leibcor setting, and I sold it about a year after that. I don't remember seeing it sell the second time, but the lady you bought it from didn't seem to be the same one I sold it to.

I'll check my pics and see if I took any shots of it nekked, I think I had it unmounted at one point...

 

[MustangGal]

Well, I didn't find any loose shots in my photobucket, but I'll try to look at what's on my home computer tonight. I did have this one though, a good side shot that shows some of the colors

 

[beaujolais]

LD - Your collection sounds so wonderful ! Absolutely.
Do you have any recommendations of where to look for champagnes/browns, in addition to - of course, DBL ?
(Like I needed to find something else to put on my "list" ! Oh dear. )

Mustang - Thanks for the reply ! Great photo, btw. I love how the setting looks, too, in it. Another bravo on picking that setting out for it. I'm a vintage lover, so it totally works. Oh, it seems to have a yellow fluorescence. Thanks again for the info & photo. The photo of it, pre-Mustang Gal would be great, if you do find it.

Sonoma

 

[MustangGal]

I must not have taken any pictures when it was loose, this it the only other good shot I have.

I'm happy to know it found a good home!

 

[yssie]

Thanks again, David ! Very much.

Sonoma,

I question whether what you are seeing is a primary function of the cut more likely the absorption/luminesence properties of the material.

Judging from the photograph I'd say the red you are seeing is not exclusively dispersion and you would be best posting your question in the colored gem forum as they will better capable of a more comprehensive answer.

dispersion - separation into component wavelengths upon refraction, if outbound (brown) ray has red component will see red 'dispersion'.

 

[beaujolais]

Sorry I'm late on the response. I couldn't post last night. Mustang - another great photo ! Thanks so much.

Yssie - that totally makes sense. Now I get it.

Thanks guys.

 

[ChunkyCushionLover]

Thanks again, David ! Very much.

Sonoma,

I question whether what you are seeing is a primary function of the cut more likely the absorption/luminesence properties of the material.

Judging from the photograph I'd say the red you are seeing is not exclusively dispersion and you would be best posting your question in the colored gem forum as they will better capable of a more comprehensive answer.

dispersion - separation into component wavelengths upon refraction, if outbound (brown) ray has red component will see red 'dispersion'.

I see a moderately saturated champagne color with a soft shaped patch of more highly saturated orangey red. This is not a typical sharp disperion pattern found when observing fire in colorless diamonds. I'm over my head in my ability to properly explain this appearance and I know it. Do you really think its as simple as you just explained? The process of disperion by itself doesn't lead to a strong absorption of the blue and green wavelengths, that is a seperate process not explained thus far in this thread and why I suggested this be posted in the CS forum.

 

[yssie]

Thanks again, David ! Very much.

Sonoma,

I question whether what you are seeing is a primary function of the cut more likely the absorption/luminesence properties of the material.

Judging from the photograph I'd say the red you are seeing is not exclusively dispersion and you would be best posting your question in the colored gem forum as they will better capable of a more comprehensive answer.

dispersion - separation into component wavelengths upon refraction, if outbound (brown) ray has red component will see red 'dispersion'.

I see a moderately saturated champagne color with a soft shaped patch of more highly saturated orangey red. This is not a typical sharp disperion pattern found when observing fire in colorless diamonds. I'm over my head in my ability to properly explain this appearance and I know it. Do you really think its as simple as you just explained? The process of disperion by itself doesn't lead to a strong absorption of the blue and green wavelengths, that is a seperate process not explained thus far in this thread and why I suggested this be posted in the CS forum.

I do not think she was posting a 'fire' picture, just a picture of the diamond. Besides 'dispersion' specifies separation into component frequencies, not specifically of white light which has green/blue/whatever, absorption of those other input wavelengths is before the final refraction - how? very different debate, and there is nothing simple about that.

 

[Garry H (Cut Nut)]

Thanks again, David ! Very much.

Sonoma,

I question whether what you are seeing is a primary function of the cut more likely the absorption/luminesence properties of the material.

Judging from the photograph I'd say the red you are seeing is not exclusively dispersion and you would be best posting your question in the colored gem forum as they will better capable of a more comprehensive answer.

dispersion - separation into component wavelengths upon refraction, if outbound (brown) ray has red component will see red 'dispersion'.

I see a moderately saturated champagne color with a soft shaped patch of more highly saturated orangey red. This is not a typical sharp disperion pattern found when observing fire in colorless diamonds. I'm over my head in my ability to properly explain this appearance and I know it. Do you really think its as simple as you just explained? The process of disperion by itself doesn't lead to a strong absorption of the blue and green wavelengths, that is a seperate process not explained thus far in this thread and why I suggested this be posted in the CS forum.

The light source also plays an important role.
e.g. in some of the movies we have made in the LBox there is a persistant violet flash. Turns out this is a spectral spike from the lamps, and possibly a sensitivity from the CCD card.

 

[beaujolais]

Correct, Yssie - no one was posting a fire picture.

Thanks Garry. The light in which I'm speaking of its red flashes is when it is scrupulously clean and in either outdoor filtered light or indoor high hat lighting.