Color Shift Chrysoberyl Ring

[Lisa Loves Shiny]

This is an almost 9mm cushion cut, color shift chrysoberyl in a champagne diamond halo Ring. I would LOVE to update and improve the setting someday. Color shifts from greenish yellow to yellow orangey in different lights.

Regards,
Lisa

 

[LaurenThePartier]

Lovely! I have a Chryso cut by Dan Stair, and I wish it had a colour shift! I''m starting to really get into those!

 

[Lisa Loves Shiny]

Some shift in this pic.

 

[Linda W]

Beautiful ring Lisa, I really like the stone. I never saw one before and it is beautiful.


Linda

 

[mochi]

Very interesting, and nice.

 

[LD]

I adore Chrysoberyl - it''s so sparkly! What sort of setting are you thinking of changing to?

 

[neatfreak]

Very cool! I love color change stones.

 

[Fly Girl]

Zeolite made an interesting comment in this thread Link, about how narrow the yellow color is in the visible light spectrum, and how it doesn''t take much shift in the light to bring out the green. There are some charts of the spectrum bandwidths near the bottom of the thread. Green is on one side of yellow, and orange is on the other. He writes: "You can go from yellow-green at 565 nm to golden at 580 nm, a 15 nm spread. In red, a broad color, you can go from 650 nm to 700nm, a 50 nm spread, and still be the same red. "

I recently purchased a yellow beryl, and I asked about whether it shifted to greenish yellow in some lights, because I love the effect as well. In researching the yellow beryl colors on the websites, I''m beginning to think that a greenish color shift means a cheaper stone. So, let''s not let the word get out that we LOVE color shifting stones.

Beautiful chrysoberyl, Lisa. Enjoy!!

 

[Lisa Loves Shiny]

Date: 11/7/2008 3:21:44 PM
Author: Fly Girl


Zeolite made an interesting comment in this thread Link, about how narrow the yellow color is in the visible light spectrum, and how it doesn't take much shift in the light to bring out the green. There are some charts of the spectrum bandwidths near the bottom of the thread. Green is on one side of yellow, and orange is on the other. He writes: 'You can go from yellow-green at 565 nm to golden at 580 nm, a 15 nm spread. In red, a broad color, you can go from 650 nm to 700nm, a 50 nm spread, and still be the same red. '

I recently purchased a yellow beryl, and I asked about whether it shifted to greenish yellow in some lights, because I love the effect as well. In researching the yellow beryl colors on the websites, I'm beginning to think that a greenish color shift means a cheaper stone. So, let's not let the word get out that we LOVE color shifting stones.

Beautiful chrysoberyl, Lisa. Enjoy!!

Flygirl I am glad you like the stone

but it is not in the Beryl Family. Beryl is a more common stone with a hardnes of 7.5 and a refractive index of 1.577 to 1.58 I believe. Chrysoberyl is in the Alexandrite family and a color shift Chrysoberyl is more rare.



Here is some info from Multicolour Gems: Chrysoberyl
Colors, yellow, green, color changing, red, blue-green, greenish-yellow or brown.
Refractive Index: 1.741 - 1.760
Chemical Composition: BeAl2O4
Hardness: 8.50
Density: 3.73
Crystal Group: Orthorhombic
Ocurrence: Ceylon, Tanzania, Russia, Madagascar, Brazil.
Sign of the Zodiac: Leo
The name Chrysoberyl is derived from the Greek words chrysos and berullos, meaning “golden” and “gem crystal.” Despite the similarity of their names, Chrysoberyl and Beryl are two completely different gemstones unrelated in any other way. Members of the beryl group include emerald, aquamarine, and morganite while members of the chrysoberyl group only include chrysoberyl, cymaphane and alexandrite. Beryl is a silicate with chemical composition Be3Al2(SiO3)6 and chrysoberyl is an oxide with composition BeAl2O4. Although they both contain beryllium, they are separate gemstone species and do not crystallize the same. Beryl crystallizes hexagonally while chrysoberyl crystallizes with orthorhombic arrangement.

Thanks for the nice comments. I would love to have this in a really nice WG Diamond halo with VS diamonds. I would like two surprise Red Garnets on the sides. I do love the stones sparkle and color shift. Right now it is light orange.

Regards,
Lisa

 

[T L]

Beautiful lemony stone. It''s also huge!!

 

[Fly Girl]

Thank you for the clarification, Lisa. I don''t have the stone types confused, but, as you note, the names are very similar. I mentioned it because my yellow beryl (which, of course, is a completely different kind of stone from your gorgeous chrysoberyl) happens to have a similar color shift. I found zeolite''s explanation interesting, and figured it probably applied to your chrysoberyl, my beryl, as well as to the diaspore he was referring to in the original thread.

 

[Lisa Loves Shiny]

Date: 11/7/2008 8:41:22 PM
Author: Fly Girl
Thank you for the clarification, Lisa. I don''t have the stone types confused, but, as you note, the names are very similar. I mentioned it because my yellow beryl (which, of course, is a completely different kind of stone from your gorgeous chrysoberyl) happens to have a similar color shift. I found zeolite''s explanation interesting, and figured it probably applied to your chrysoberyl, my beryl, as well as to the diaspore he was referring to in the original thread.

Flygirl, thanks for being gracious, I thought you had the stones confused but of course you did not. My apologies. So now my curiosity is really peaked. I had bought this stone and after testing by my GIA graduate appraiser was told that is was the color shift chrysoberyl. She did the RI and such, and viewed the color shift at "northern daylight" and then at incadescent light (however that occured). Color shift from to greenish yellow to yellow orangey pink. So..............the stone appraised at $600. I thought it was unusual and rare.

But if a Beryl will shift easily then perhaps I am mistaken? The link suggests that the color shift in my yellow stone is not rare at all. Does my CS chrysoberyl exhibit a shift that most other chrysoberyls would do given the right lighting? I am intrigued. Right now under GE light it is orangey pink with hardly any yellow. Will a Beryl or yellow citrine do the same? I only no other yellow stones to compare this with. I would love more input on this. Thanks for the link. Also would love a pic or link to your beryl. I still cannot get over my fascination with CC gems.

Thanks so much,
Lisa

 

[Fly Girl]

Unfortunately, the yellow beryl that does the color shift has been gifted to my SIL for her birthday. A replacement that I got for myself (since I loved hers!) doesn''t have nearly as nice a shift. So, no reason to think that your color shifting chrysoberyl isn''t quite unusual. I really don''t know. Please, continue to enjoy your very pretty stone.

 

[marcy]

Very cool ring; pretty color too.

 

[MMT]

Very pretty, I had never heard of shift stones before