Proposal Ring - Part 3

[iamnotshawn]

C) 0.74c G VVS2 Ideal Cut GIA-5326507553 $5900

Sent from Samsung SM-G965F using GAGT

 

[Miltah]

I went to HoH and took a look at some of their diamonds that are within my budget. Need some advice from the experts here. Below are the scope images. All the diamonds are Ideal cuts. Of the 3, which one would you recommend?

You got three very nice ideal cuts.
- 0.74 has some issue with non-uniform heart separation.
- if u zoom in, the 0.72 has uneven girdling on the edges
I can’t spot anything wrong with the 0.73... lol

 

[KingKenny]

You got three very nice ideal cuts.
- 0.74 has some issue with non-uniform heart separation.
- if u zoom in, the 0.72 has uneven girdling on the edges
I can’t spot anything wrong with the 0.73... lol

I spotted it! The girdles are uneven in different sizes.
The 0.72 has it too at the 11 & 1 o'clock girdle.

 

[theblueark]

I spotted it! The girdles are uneven in different sizes.
The 0.72 has it too at the 11 & 1 o'clock girdle.

Super high standards for ideal. Thumbs up HoH.

 

[Miltah]

Since we were talking about lab grown earlier...

Here’s the 2 main lab grown options

The declining cost for producing a 1ct stone: $300-500

Here’s something interesting, high growth but future expectating low profitability

If consumers see lab grown similar to natural, we can expect a 30% drop of natural prices.
Even if consumers see then as different, it is still likely to place some downward pressure on natural pricing

 

[iamnotshawn]

Thanks everyone for your input. Have anyone tried asking for discount at HoH? Hahaha

Sent from Samsung SM-G965F using GAGT

 

[KinoChoco]

Thanks everyone for your input. Have anyone tried asking for discount at HoH? Hahaha

Sent from Samsung SM-G965F using GAGT

I remember they used to give like 3% discount if full cash payment, but that’s 2-3 years ago news.

 

[Miltah]

I remember they used to give like 3% discount if full cash payment, but that’s 2-3 years ago news.

Jp will probably offer u the same too

 

[Miltah]

An average of 120-150 million carets annually ...

 

[Miltah]

India cuts and polish up 90% of the worlds stones ...

 

[Miltah]

I guess that’s why you find most online superideal vendors in the US...

 

[blurpandasg2014]

Anyone knows if Brian gavin black series is on par or even better than JP SIC becos of its patented 'gavin effect'

And I realised that my friend's diamond ring displays good contrast (can see the arrows clearly+ firey)... Is there a special crown / pav angle to achieve such effect as I don't see JP sic having such effect

 

[Miltah]

Anyone knows if Brian gavin black series is on par or even better than JP SIC becos of its patented 'gavin effect'

And I realised that my friend's diamond ring displays good contrast (can see the arrows clearly+ firey)... Is there a special crown / pav angle to achieve such effect as I don't see JP sic having such effect

If u understand what is the Gavin effect then u will know if the blacks are better.

Is seeing arrows a good thing? At what distance from your friends ring did u notice the arrows?

 

[CheeRs87]

Anyone knows if Brian gavin black series is on par or even better than JP SIC becos of its patented 'gavin effect'

And I realised that my friend's diamond ring displays good contrast (can see the arrows clearly+ firey)... Is there a special crown / pav angle to achieve such effect as I don't see JP sic having such effect

This is what I read: ''The Black by Brian Gavin signature diamonds have ancillary facet angles which are optimized to reduce low intensity light zones within the diamond (they coin it the “Gavin Effect™”). To put in layman terms, the term “ancillary facets” basically refers to the star facets, upper girdle facets and lower girdle facets.''

Its just to do with the star facets, upper and lower girdles that generally affects the thickness of the arrows and fire.

Smaller lower girdles will give thicker arrows = easier to see the blacks and obvious arrows. Pros is you get better fire but at the expense of reducing the brightness. These types of diamonds tend to look better in places with spotlights but worse in daylight.

Higher lower girdles is the opposite effect with thinner arrows. The best range that most people will want is 75-85%.

Star facet is more to do with the contrast in the triangle size near the crown part. It doesn't affect the arrows. The best range is 50-55%.
This site has good info about it: https://www.prosumerdiamonds.com/star-facet

Upper girdle is more to do with the classic, painted, dugged girdles and then being regular (doesn't affect arrows). Though I do see some painting and digging effect on some of their Black series. Maybe this part is not implemented by them yet.

Essentially, the only part that should affect the arrows in the Gavin Effect is the lower girdle facets and that's mostly to do with the thickness of it. ]

I think its more to do with the light you're seeing them under too.
This is my JP SIC. Star facet 50%, lower girdle facet 80%, Upper girdle is Classic. The arrows are most obvious in outdoor shaded lights and my kitchen and bedroom light. My kitchen and bedroom light is fluorescence and energy saving LED. They are all covered with a frosted glass which acts as a diffusion. Best lighting to see arrows are in diffused lights. The rest of the other lights is more to see fire then cannot see the arrows clearly.

P.S. Make sure your diamond is clean too

 

[Miltah]

Fire or coloured dispersion is not the same as brilliance. Table size has a bigger impact on fire.

Optimal lower girdle facet is best around 76-78% as you affect the hearts with higher LGF.

JP SIC with gia report might be 80% but due to the rounding off, it might be a 78%. Only AGS gives u more exact LGF%.

 

[CheeRs87]

Fire or coloured dispersion is not the same as brilliance. Table size has a bigger impact on fire.

Optimal lower girdle facet is best around 76-78% as you affect the hearts with higher LGF.

JP SIC with gia report might be 80% but due to the rounding off, it might be a 78%. Only AGS gives u more exact LGF%.

True.. its a pity that GIA rounds it by 5%. That's where the scopes are more useful to compare the arrows.

Was reading on GIA https://www.gia.edu/doc/booklet_finish_culet_girdle.pdf
Both the upper and lower girdle facet affects the painting and digging. Not just the upper facets. It happens when they try to save the carat weight to make it bigger or remove inclusions on the side.

During fashioning, the polisher uses techniques called “painting” and “digging out” to change the relative positions of the upper and/or lower half facets. As a result, the girdle edge at the half-facet junctions can become thicker or thinner relative to the girdle edge at the bezel-main junctions and their relative angles change.

Both techniques can be used to maximize weight yield, especially if a small difference can lift a diamond beyond an important weight threshold, such as the half-carat, one-carat or two-carat levels. Digging is also used to remove clarity characteristics located near the girdle. Moderate to strong painting or digging out will change the face-up appearance of a diamond, even if all of the facets are arranged symmetrically and the proportions fall within traditional ranges for better looking diamonds.

 

[Miltah]

True.. its a pity that GIA rounds it by 5%. That's where the scopes are more useful to compare the arrows.

Was reading on GIA https://www.gia.edu/doc/booklet_finish_culet_girdle.pdf

It’s a great article on factors which affect cut but the whole GIA cut grade is just too loose..

 

[blurpandasg2014]

This is what I read: ''The Black by Brian Gavin signature diamonds have ancillary facet angles which are optimized to reduce low intensity light zones within the diamond (they coin it the “Gavin Effect™”). To put in layman terms, the term “ancillary facets” basically refers to the star facets, upper girdle facets and lower girdle facets.''

Its just to do with the star facets, upper and lower girdles that generally affects the thickness of the arrows and fire.

Smaller lower girdles will give thicker arrows = easier to see the blacks and obvious arrows. Pros is you get better fire but at the expense of reducing the brightness. These types of diamonds tend to look better in places with spotlights but worse in daylight.

Higher lower girdles is the opposite effect with thinner arrows. The best range that most people will want is 75-85%.

Star facet is more to do with the contrast in the triangle size near the crown part. It doesn't affect the arrows. The best range is 50-55%.
This site has good info about it: https://www.prosumerdiamonds.com/star-facet

Upper girdle is more to do with the classic, painted, dugged girdles and then being regular (doesn't affect arrows). Though I do see some painting and digging effect on some of their Black series. Maybe this part is not implemented by them yet.

Essentially, the only part that should affect the arrows in the Gavin Effect is the lower girdle facets and that's mostly to do with the thickness of it. ]

I think its more to do with the light you're seeing them under too.
This is my JP SIC. Star facet 50%, lower girdle facet 80%, Upper girdle is Classic. The arrows are most obvious in outdoor shaded lights and my kitchen and bedroom light. My kitchen and bedroom light is fluorescence and energy saving LED. They are all covered with a frosted glass which acts as a diffusion. Best lighting to see arrows are in diffused lights. The rest of the other lights is more to see fire then cannot see the arrows clearly.

P.S. Make sure your diamond is clean too

Thank u for the very nice video.
Can u share the GIA no of ur diamond for the dimensions

 

[Whisky&Spaniels]

Just got my scopes and images from JP. Is there a way to post the photos without having to have 50 posts first?

 

[Sushilicious]

Just got my scopes and images from JP. Is there a way to post the photos without having to have 50 posts first?

Break up the link and paste here. We can upload it for you.