Find your diamond
Find your jewelry
shape
carat
color
clarity

Questions on Fire and Brillance

ElizabethR

Shiny_Rock
Joined
Jan 19, 2011
Messages
313
:wavey:
I'm getting ready to replace a .71 H&A with a 1.00-1.10 H&A (Both G VS1/2)
But I'm wondering, what are the qualities in a diamond that guarantee fire and brilliance?
I'm looking at two diamonds, one is HCA 0.9 the other is 1.1. But as I'm buying online I
can't see if they have fire or not.

Any helpful advice welcomed,
Elizabeth
 

diamondseeker2006

Super_Ideal_Rock
Premium
Joined
Jan 11, 2006
Messages
55,816
Elizabeth, I think you are really safe with a H&A stone. The lighting has so much to do with whether I see fire or bright white coming from mine! Can you list the numbers on the stones you are considering?
 

dreamer_dachsie

Super_Ideal_Rock
Joined
Dec 16, 2007
Messages
24,364
Sounds like both stones you are considering are nice balanced cuts.

If you want to choose a diamond specifically that will favour one type of light return over the other, that is another story...
 

Gibson486

Rough_Rock
Joined
Dec 28, 2010
Messages
91
diamondseeker2006|1304218407|2908863 said:
Elizabeth, I think you are really safe with a H&A stone. The lighting has so much to do with whether I see fire or bright white coming from mine! Can you list the numbers on the stones you are considering?
YUP...

the HCA is a little misleading. People think that if it score excellent on all counts, it will always have high fire and whatever in all situations. This is false. In direct sunlight, you will not see much fire at all because you are blasting it with natural light. In this case, you will just see bright white and little fire at all in a very well cut stone because the lighting is so strong that any diffused light is overcome by the direct light.
 

slg47

Ideal_Rock
Joined
Apr 4, 2010
Messages
9,667
Gibson486|1304254511|2909045 said:
diamondseeker2006|1304218407|2908863 said:
Elizabeth, I think you are really safe with a H&A stone. The lighting has so much to do with whether I see fire or bright white coming from mine! Can you list the numbers on the stones you are considering?
YUP...

the HCA is a little misleading. People think that if it score excellent on all counts, it will always have high fire and whatever in all situations. This is false. In direct sunlight, you will not see much fire at all because you are blasting it with natural light. In this case, you will just see bright white and little fire at all in a very well cut stone because the lighting is so strong that any diffused light is overcome by the direct light.
actually sunlight is where I see the most fire.
 

yssie

Super_Ideal_Rock
Premium
Joined
Aug 14, 2009
Messages
20,775
1. Pics to confirm H&A, or did you see patterning through a H&A viewer in-person? H&A means very little without knowing *who* says it's H&A and how they are determining this. You don't need H&A to have a pretty stone, but you do want H&A if you're paying for H&A!

2. As Dreamer said - lighting determines the vast majority if what you see. All diamonds will show colour in some lights, and white in some lights... different proportions will show more colour or white in the "grey area" lights that don't favour one to the exclusion of the other (spotlighting, direct sunlight - where I also see colour, diffuse light). The numbers are a good starting point to say which way that particular stone will err
 

ElizabethR

Shiny_Rock
Joined
Jan 19, 2011
Messages
313
The diamond is 1.10 G VS2.

I don't have any pictures, but the EGL report says it has 8 hearts and 8 arrows. Here are the measurements:

6.68-6.65x4.09

1.10ct

61.4
56%
15%
43%

HCA 0.9

Based on this information what do you think?
 

yssie

Super_Ideal_Rock
Premium
Joined
Aug 14, 2009
Messages
20,775
Don't have a clue how EGL determines H&A and how robust their methods are - don't pay a premium for a H&A stone w/o photos or in-person confirmation through a H&A scope.

Numbers are fine, but percent measurements are - imprecise at best - rounded and averaged, and so you don't know what range of angles went into those percentages.. Playing w/ GIA's facetware (https://www.gia.edu/facetware/), I see that for a stone w/ med girdle, 56Table, 15%crown can mean anything from 33.5-35 and 43%pav from 40.6-41, which are big ranges. Do you have any pictures?

Best to have it shipped out to you to inspect in-person before you have it set - that way you can be sure it's what you're looking for. Be sure to get an idiot-proof return policy in writing before you pay anything!
 

ElizabethR

Shiny_Rock
Joined
Jan 19, 2011
Messages
313
The stone I was interested in sold over the weekend. So they sent me the report of another I might like.

Can anyone tell me what the red marks on the stone are?

OutputCertificatesOXT47726.jpg
 
Be a part of the community It's free, join today!
    August Birthstones: Peridot And Sardonyx
    August Birthstones: Peridot And Sardonyx
    The Original: Princess Raiyah Of Jordan
    The Original: Princess Raiyah Of Jordan
    Celebratory Engagement Ring Upgrade And Bracelet
    Celebratory Engagement Ring Upgrade And Bracelet

Need Something Special?

Get a quote from multiple trusted and vetted jewelers.

Holloway Cut Advisor



Diamond Eye Candy

Click to view full-size image.
Top