Hearts and arrows Vs Idealscope?

[WinkHPD]

Depth 60.5-62.1
Table 55-57
Pavilion 40.6-40.8
Crown 34-34.5

This was followed by the more broad angles. I thought that was interesting... I figured presumably that was something that preferenced fire? A lot of people on here talk about their sweet spot for crown and pavillion angles. Do you have one?

Preferred angles and sweet spots are all well and good, but please remember, those are averaged numbers. So, for example, a 40.6 pavilion angle that is a tight average with nothing below a 40.5 is probably going to look stunning, but what if one or two of those lower pavilion mains are at 40.35? Those are going to be leaky facets, ruining the overall brightness of the diamond.

There are some things we just can not judge by the numbers, and how well the diamond is cut is one of them. If the averages are looking good but they are garnered from widely disparate variances, it will still not be gorgeous. Thus the need for good images and having the knowledge to interpret them.

Wink

 

[Lykame]

Preferred angles and sweet spots are all well and good, but please remember, those are averaged numbers. So, for example, a 40.6 pavilion angle that is a tight average with nothing below a 40.5 is probably going to look stunning, but what if one or two of those lower pavilion mains are at 40.35? Those are going to be leaky facets, ruining the overall brightness of the diamond.

There are some things we just can not judge by the numbers, and how well the diamond is cut is one of them. If the averages are looking good but they are garnered from widely disparate variances, it will still not be gorgeous. Thus the need for good images and having the knowledge to interpret them.

Wink

Absolutely excellent point @Wink, thank you so much for taking the time to help with my questions. Absurdly grateful.

 

[Lykame]

Haha, I get that. I'm a very upbeat and positive person most the time. Yet when I analyze things that matter I tend to look for the negatives which has served me very well in my career as i can accurately pinpoint risk and create alternatives or plans to mitigate that risk.

Unfortunately I've learned it drives many people nuts as they think I just nitpick and find the negative in everything. In reality I just like a real view of my situation so I know exactly what I'm getting in and what I can to do to ensure survival. Not that buying diamonds is life threatening unless your dealing in the underworld markets.

Sounds a bit anxiety producing!

I am really looking forward to my ASET scope arriving. I have to wonder if these stones that score between ideal and excellent on the ASG charts but more than two in the HCA perhaps won't in general perform as well stones in similar regions. It would be nice to just be able to ballpark the AGS chart as it's quicker.

Thanks @sledge!

ETA: obviously as mentioned above it's all dependent on the underlying numbers of these averages anyway.

 

[WinkHPD]

Sounds a bit anxiety producing!

Lykame, I do not personally know @sledge yet. However, from his avatar photos, I strongly suspect he has served his country in a combat capacity. Trust me, when you are getting ready for combat, you REALLY WANT an extreme detail oriented person or three on your team. It is the lack of such a detail oriented person which would be anxiety producing.

Sledge, if you have served, I thank you for your service.

Wink

 

[Lykame]

Lykame, I do not personally know @sledge yet. However, from his avatar photos, I strongly suspect he has served his country in a combat capacity. Trust me, when you are getting ready for combat, you REALLY WANT an extreme detail oriented person or three on your team. It is the lack of such a detail oriented person which would be anxiety producing.

Sledge, if you have served, I thank you for your service.

Wink

As I'm not American I'm sure I miss some of the clues but now you've said that, based on many of the things I've seen him say that would actually make a great deal of sense!

Still sounds anxiety producing but as you know there are different types of anxiety. They're not all bad per se - sometimes they help you get the job done, and that's especially useful in life or death jobs...

 

[Karl_K]

lower pavilion mains are at 40.35? Those are going to be leaky facets, ruining the overall brightness of the diamond.

Wink my friend just a little correction,
40.35 causes obstruction(Obscuration) issues not leakage.
In other words in a ring it stays dark at to great a distance.

 

[WinkHPD]

Wink my friend just a little correction,
40.35 causes obstruction(Obscuration) issues not leakage.
In other words in a ring it stays dark at to great a distance.

I stand corrected. Leak, obstruct, both are NOT good... therefor < 40.4 equals BAD!

Bad masquerading as good is still BAD! 40.6 is a dangerous angle if you do not know that the cutter is extremely tight so that it is actually good, not bad masquerading as good.

Now I am going to be to hope that some of the smarts I had yesterday leaks back in.

Sigh...

 

[Karl_K]

I stand corrected. Leak, obstruct, both are NOT good... therefor < 40.4 equals BAD!

Bad masquerading as good is still BAD! 40.6 is a dangerous angle if you do not know that the cutter is extremely tight so that it is actually good, not bad masquerading as good.

Now I am going to be to hope that some of the smarts I had yesterday leaks back in.

Sigh...

lol
Yea, its something that needs to be checked like many things in the diamond world it comes down to eyes.
The thing is that actual 40.6 works with a lot of higher crowns as well as ones in the tolk range that I and many others happen to like the looks and performance of them. GIA rounding does not help at all.
I don't remember if you were with Infinity at the time, but Paul many years ago cut a bunch of diamonds to 40.5 AGS numbers.
It caused a lot of talk but he kept the mains all above ~40.45 so they were fine but it raised a pretty large amount of buzz.