Please advice me i choose this ring for my love HCA score 1.3

[chayasak]

HCA score 1.3 Should i buy it for her?

Shape	Round Brilliant
Measurements	4.74 - 4.77 x 2.87 mm
Carat Weight	0.40 carat
Color Grade	H
Clarity Grade	VS2
Cut Grade	Excellent

Depth	60.4%
Table	60%
Crown Angle	32.5°
Crown Height	13.0%
Pavilion Angle	41.0°
Pavilion Depth	43.5%
Star Length	45%
Lower Half	75%
Girdle	Medium to Slightly Thick, Faceted, 4.0%
Culet	None

Polish	Excellent
Symmetry	Excellent

Fluorescence

None

CLARITY CHARACTERISTICS​

Clarity Characteristics

Crystal, Cloud

 

[musicloveranthony]

Is there a link to photos and/or video of the stone? It's considered a 60/60 which aren't necessarily the prettiest stones. Doesn't need to be a dealbreaker, but could be worth looking at other options

 

[Kim N]

I don't love these proportions for a ring. It will have a somewhat flat profile due to the shallow crown angle and large table.

Are you open to buying online? If so, which country are you located in? We would be happy to help you search.

 

[chayasak]

Is there a link to photos and/or video of the stone? It's considered a 60/60 which aren't necessarily the prettiest stones. Doesn't need to be a dealbreaker, but could be worth looking at other options

Pls advice me thanks

 

[chayasak]

I don't love these proportions for a ring. It will have a somewhat flat profile due to the shallow crown angle and large table.

Are you open to buying online? If so, which country are you located in? We would be happy to help you search.

Pls advice me thanks

 

[Kim N]

Pls advice me thanks

These are a bit more promising, but we need to see a vendor video to evaluate them further.

 

[chayasak]

These are a bit more promising, but we need to see a vendor video to evaluate them further.

Sorry, I don’t have video from shop

 

[Kim N]

This is an example of what I'd recommend. Is it a possibility for you?

0.43 Carat round diamond

This 0.43 carat round diamond H color vs1 clarity has Excellent proportions and a diamond grading report from GIA

www.jamesallen.com

 

[chayasak]

This is an example of what I'd recommend. Is it a possibility for you?

0.43 Carat round diamond

This 0.43 carat round diamond H color vs1 clarity has Excellent proportions and a diamond grading report from GIA

www.jamesallen.com

Thank you sir but i’m from Thailand and already deposit money at shop if see only proportions detail pls advice me for 4 choices. Many thanks
1.

2

3


4

 

[chayasak]

Thank you sir but i’m from Thailand and already deposit money at shop if see only proportions detail pls advice me for 4 choices. Many thanks
1.

2

3


4

Which one is the best?

 

[Kim N]

Thank you sir but i’m from Thailand and already deposit money at shop if see only proportions detail pls advice me for 4 choices. Many thanks
1.

2

3


4

Based only on the proportions and the inclusions, I like #1 the best.

 

[chayasak]

Based only on the proportions and the inclusions, I like #1 the best.

Thank you Sir.

 

[sledge]

Echo the fact #1 is the best of your choices thus far. However, take that with a huge grain of salt. We haven't seen a picture or video of the stone. Also, while these are the best proportions presented there is still some inherent risk as they are on the "fringe" and this stone will likely have some imperfections.

If you really want to get tight on the proportions, have your jeweler look for a stone that fall within this criteria:

54-57 table
60.5-62 depth
34-35 crown
40.6-40.8 pavilion
75-80 lower girdle facets
45-55 stars
No culet
GIA 3x or even better AGS 000

Remember, that ALL these proportions must fall within the proper ranges for it to stand a good chance of working as they all work in conjunction with each other. So if you meet 1 or 2 but the others don't then it won't have the same affect.

Also, there needs to be an inverse relationship with the crown & pavilion angles, meaning high crown needs a low pavilion (35/40.6) or vice versa with a low crown and high pavilion (34/40.8 ).

The other thing to keep in mind is the data we see on lab reports is averaged and rounded. This is important because there are actually 8 crown and 8 pavilion facets in a modern round brilliant (MRB) diamond. Yet when you look on the lab report you see a single value for each. This is because with crowns they measure all 8 and then average the values and round to the nearest 0.5 degrees. They do the same with the pavilion except they round to the nearest 0.2 degrees.

Because of the averaging & rounding, it makes stones on the "fringe" of acceptability more risky because without advanced images (or basic photo & video at the least) it's really hard to assess rather or not the stone will work.

Ideally you'd want to follow this procedure for identifying a stone to purchase:

1. Short list based on proportions shown on the lab reports.

2. Look at actual photos & videos to ensure good symmetry, good contrast, clean arrows are clearly defined, no leakage, no funky inclusions, etc.

3. Request advanced images. Idealscope and ASET tell us about light return/performance. Hearts and arrows (H&A) images tells us about the symmetry of the stone. Not all vendors will have or be able to provide advanced images; however, some local jewelers may have ASET, idealscope and/or H&A scopes in the store for further analysis. If they don't have their own scopes or can't get advanced images, then you can always buy your own scope(s). I'd recommend an ASET as it provides the most information and costs about $50 USD.

FYI, here are HCA scores on each of the 4 stones you mentioned. As noted, #1 was the best option but its proportions are on the fringe.

 

[chayasak]

Based only on the proportions and the inclusions, I like #1 the best.

Thank you Sir.

Echo the fact #1 is the best of your choices thus far. However, take that with a huge grain of salt. We haven't seen a picture or video of the stone. Also, while these are the best proportions presented there is still some inherent risk as they are on the "fringe" and this stone will likely have some imperfections.

If you really want to get tight on the proportions, have your jeweler look for a stone that fall within this criteria:

54-57 table
60.5-62 depth
34-35 crown
40.6-40.8 pavilion
75-80 lower girdle facets
45-55 stars
No culet
GIA 3x or even better AGS 000

Remember, that ALL these proportions must fall within the proper ranges for it to stand a good chance of working as they all work in conjunction with each other. So if you meet 1 or 2 but the others don't then it won't have the same affect.

Also, there needs to be an inverse relationship with the crown & pavilion angles, meaning high crown needs a low pavilion (35/40.6) or vice versa with a low crown and high pavilion (34/40.8 ).

The other thing to keep in mind is the data we see on lab reports is averaged and rounded. This is important because there are actually 8 crown and 8 pavilion facets in a modern round brilliant (MRB) diamond. Yet when you look on the lab report you see a single value for each. This is because with crowns they measure all 8 and then average the values and round to the nearest 0.5 degrees. They do the same with the pavilion except they round to the nearest 0.2 degrees.

Because of the averaging & rounding, it makes stones on the "fringe" of acceptability more risky because without advanced images (or basic photo & video at the least) it's really hard to assess rather or not the stone will work.

Ideally you'd want to follow this procedure for identifying a stone to purchase:

1. Short list based on proportions shown on the lab reports.

2. Look at actual photos & videos to ensure good symmetry, good contrast, clean arrows are clearly defined, no leakage, no funky inclusions, etc.

3. Request advanced images. Idealscope and ASET tell us about light return/performance. Hearts and arrows (H&A) images tells us about the symmetry of the stone. Not all vendors will have or be able to provide advanced images; however, some local jewelers may have ASET, idealscope and/or H&A scopes in the store for further analysis. If they don't have their own scopes or can't get advanced images, then you can always buy your own scope(s). I'd recommend an ASET as it provides the most information and costs about $50 USD.

FYI, here are HCA scores on each of the 4 stones you mentioned. As noted, #1 was the best option but its proportions are on the fringe.

Thank you very much for your kind. This information useful for me.

 

[chayasak]

Echo the fact #1 is the best of your choices thus far. However, take that with a huge grain of salt. We haven't seen a picture or video of the stone. Also, while these are the best proportions presented there is still some inherent risk as they are on the "fringe" and this stone will likely have some imperfections.

If you really want to get tight on the proportions, have your jeweler look for a stone that fall within this criteria:

54-57 table
60.5-62 depth
34-35 crown
40.6-40.8 pavilion
75-80 lower girdle facets
45-55 stars
No culet
GIA 3x or even better AGS 000

Remember, that ALL these proportions must fall within the proper ranges for it to stand a good chance of working as they all work in conjunction with each other. So if you meet 1 or 2 but the others don't then it won't have the same affect.

Also, there needs to be an inverse relationship with the crown & pavilion angles, meaning high crown needs a low pavilion (35/40.6) or vice versa with a low crown and high pavilion (34/40.8 ).

The other thing to keep in mind is the data we see on lab reports is averaged and rounded. This is important because there are actually 8 crown and 8 pavilion facets in a modern round brilliant (MRB) diamond. Yet when you look on the lab report you see a single value for each. This is because with crowns they measure all 8 and then average the values and round to the nearest 0.5 degrees. They do the same with the pavilion except they round to the nearest 0.2 degrees.

Because of the averaging & rounding, it makes stones on the "fringe" of acceptability more risky because without advanced images (or basic photo & video at the least) it's really hard to assess rather or not the stone will work.

Ideally you'd want to follow this procedure for identifying a stone to purchase:

1. Short list based on proportions shown on the lab reports.

2. Look at actual photos & videos to ensure good symmetry, good contrast, clean arrows are clearly defined, no leakage, no funky inclusions, etc.

3. Request advanced images. Idealscope and ASET tell us about light return/performance. Hearts and arrows (H&A) images tells us about the symmetry of the stone. Not all vendors will have or be able to provide advanced images; however, some local jewelers may have ASET, idealscope and/or H&A scopes in the store for further analysis. If they don't have their own scopes or can't get advanced images, then you can always buy your own scope(s). I'd recommend an ASET as it provides the most information and costs about $50 USD.

FYI, here are HCA scores on each of the 4 stones you mentioned. As noted, #1 was the best option but its proportions are on the fringe.

I ask shop for #1 He told me this have very good H&A. How about HCA SCORE will change from 2.3 or not?

 

[chayasak]

Echo the fact #1 is the best of your choices thus far. However, take that with a huge grain of salt. We haven't seen a picture or video of the stone. Also, while these are the best proportions presented there is still some inherent risk as they are on the "fringe" and this stone will likely have some imperfections.

If you really want to get tight on the proportions, have your jeweler look for a stone that fall within this criteria:

54-57 table
60.5-62 depth
34-35 crown
40.6-40.8 pavilion
75-80 lower girdle facets
45-55 stars
No culet
GIA 3x or even better AGS 000

Remember, that ALL these proportions must fall within the proper ranges for it to stand a good chance of working as they all work in conjunction with each other. So if you meet 1 or 2 but the others don't then it won't have the same affect.

Also, there needs to be an inverse relationship with the crown & pavilion angles, meaning high crown needs a low pavilion (35/40.6) or vice versa with a low crown and high pavilion (34/40.8 ).

The other thing to keep in mind is the data we see on lab reports is averaged and rounded. This is important because there are actually 8 crown and 8 pavilion facets in a modern round brilliant (MRB) diamond. Yet when you look on the lab report you see a single value for each. This is because with crowns they measure all 8 and then average the values and round to the nearest 0.5 degrees. They do the same with the pavilion except they round to the nearest 0.2 degrees.

Because of the averaging & rounding, it makes stones on the "fringe" of acceptability more risky because without advanced images (or basic photo & video at the least) it's really hard to assess rather or not the stone will work.

Ideally you'd want to follow this procedure for identifying a stone to purchase:

1. Short list based on proportions shown on the lab reports.

2. Look at actual photos & videos to ensure good symmetry, good contrast, clean arrows are clearly defined, no leakage, no funky inclusions, etc.

3. Request advanced images. Idealscope and ASET tell us about light return/performance. Hearts and arrows (H&A) images tells us about the symmetry of the stone. Not all vendors will have or be able to provide advanced images; however, some local jewelers may have ASET, idealscope and/or H&A scopes in the store for further analysis. If they don't have their own scopes or can't get advanced images, then you can always buy your own scope(s). I'd recommend an ASET as it provides the most information and costs about $50 USD.

FYI, here are HCA scores on each of the 4 stones you mentioned. As noted, #1 was the best option but its proportions are on the fringe.

I see HCA score change from 2.3 to 2.0 (with H&A) i ask shop this diamond have H&A



but another one HCA score 1.3( with H&A) i ask shop this diamond have H&A


So i confuse to choose HCA score or proportions range.Pls advice me.Thank you in advance

 

[tyty333]

A jeweler stating that a stone is H&A is not proof. They can tell you anything. You need H&A images for proof of H&A.
Without proof, it gets the 2.3 HCA IMO.

 

[tyty333]

@chayasak There is no need to start multiple threads on the same subject. You do not provide any additional information so answers
arent going to change. The stones are not H&A unless your vendor can prove it.

You have received good feedback in this thread from knowledgeable PSers. Have you seen these stones in person? Do you have
any pics or videos? If you cant provide us with any additional information there is really nothing that can change our answers.

If you can see the stones in person, look at them in as many different lighting conditions as possible.

 

[momofive]

The HCA score is used to ELIMINATE "bad" diamonds. It's a good place to start, but it should not be the deciding factor.
There are lots of shady dealers out there. Is there any way you can see the diamonds in person? I would look through this site at as many videos as possible where people show their diamonds in different lighting conditions and tell you what they see. I wouldn't buy a diamond just based off the certificate.

 

[lovedogs]

Agree with others. A vendor claiming a stone is h&a doesnt mean anything without images to back it up
I would never recommend buying a stone sight unseen

 

[sledge]

A jeweler stating that a stone is H&A is not proof. They can tell you anything. You need H&A images for proof of H&A.
Without proof, it gets the 2.3 HCA IMO.

100% agree. I will expand on this and say that most stones are not true H&A stones. To uneducated buyers this may seem confusing because even poorly cut stones exhibit generic hearts & arrow shapes. Where they fall short is in the details that things aren’t perfectly symmetrical and aligned. This is important because when a stone hits that true H&A level it means all the main and virtual facets are optically aligned for maximum light return.

In short, true H&A stones fine tunes and maximizes the available light return and visual optics of a stone; however, for the best performance you still need to stay within a narrow range of proportions. Hence the reason you see a slight improvement in the HCA score. But that improvement is based on true H&A precision and we just don’t know that yet. Until you see proof it’s dangerous to assume otherwise.

More detailed info on H&A with graphics:

Hearts and Arrows Diamonds: Everything You Need To Know

Find out why a Hearts and Arrows diamond is considered to be so special and why they cost more. Discover the benefits here.

www.pricescope.com

 

[chayasak]

100% agree. I will expand on this and say that most stones are not true H&A stones. To uneducated buyers this may seem confusing because even poorly cut stones exhibit generic hearts & arrow shapes. Where they fall short is in the details that things aren’t perfectly symmetrical and aligned. This is important because when a stone hits that true H&A level it means all the main and virtual facets are optically aligned for maximum light return.

In short, true H&A stones fine tunes and maximizes the available light return and visual optics of a stone; however, for the best performance you still need to stay within a narrow range of proportions. Hence the reason you see a slight improvement in the HCA score. But that improvement is based on true H&A precision and we just don’t know that yet. Until you see proof it’s dangerous to assume otherwise.

More detailed info on H&A with graphics:

Hearts and Arrows Diamonds: Everything You Need To Know

Find out why a Hearts and Arrows diamond is considered to be so special and why they cost more. Discover the benefits here.

www.pricescope.com

Thank you very much for your advice

 

[DejaWiz]

Can your jeweler get/provide Ideal-Scope or ASET scope images for these two out of all the options that you've posted?