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thomasw

Rough_Rock
Joined
Apr 11, 2003
Messages
12
i am thinking of getting a diamond which has a certificate from HRD Certificates Department which is Beltest accredited. Two things worry me about this:
first I have never heard of Beltest
second the colour grade is stated to be exceptional whilte + (D) is this the same as a GIA d colour?
any help greatly appreciated

(I have posted full details of the diamond earlier today)
 

robbe

Shiny_Rock
Joined
Apr 24, 2003
Messages
147
dear thomas, you never heard of beltest because this is a sort of quality label issued by the belgian government.
be exceptional whilte + (D) means the same as GIA's D color.
robbe
 

robbe

Shiny_Rock
Joined
Apr 24, 2003
Messages
147
dear richard, thank you for your kind words. i am currently in belgium. regards, robbe
 

thomasw

Rough_Rock
Joined
Apr 11, 2003
Messages
12
thanks for this advice

any chance of either of you two giving me your opinion on the diamond comparision i posted two days ago under "diamond comparision"

your help would be very gratefully received
 

Paul-Antwerp

Ideal_Rock
Trade
Joined
Sep 2, 2002
Messages
2,859
Hi Thomas,

HRD is the only lab that bothered to get an ISO-certificate, under the control of Beltest. Basically, this should be a quality-guarantee, but it only means that they have clear procedures on how to handle their business.

However, HRD is a very reputable lab. Of course, there are always minor differences with other labs, but they have a very strict way of working. From experience, I find that HRD is clearly stricter in colour than GIA, so a D-colour HRD will probably also be a GIA-D.

Hope this helps,

Paul
 

robbe

Shiny_Rock
Joined
Apr 24, 2003
Messages
147
dear paul, have you also been noticing hrd became very easy lately with grades like vvs1, vs2-si1, si2-P1(I1). also with color some things have changed such as their h-i color...i think it is fair to say hrd once was the most consistent lab however not anymore nowadays. regards, robbe
 

Paul-Antwerp

Ideal_Rock
Trade
Joined
Sep 2, 2002
Messages
2,859
Hi Robbe,

I sometimes have the same impression, when I am looking at stones to buy. But I have a similar impression when I am being offered GIA-certed stones.

However, last month, I had about 100 stones certified by HRD, and I generally found their grading very consistent.

Live long,

Paul
 

Yupi

Rough_Rock
Joined
Feb 8, 2003
Messages
74
Can one make a preliminary conclusion that the grading quality of GIA and HRD are similar these days (since there appears to be a decline in HRD recently)?

If one is going for CUT, would I be looking for IGI and AGS ?

Even for IGI, I seem to remember there are differences across locations ?
 

robbe

Shiny_Rock
Joined
Apr 24, 2003
Messages
147
dear yupi, first i would like to tell you that from the antwerp dealers' & manufacurers' point of view, gia is not as consistent as hrd and even as igi. i am not refering to the grading 'level' but only to the consistency; submit 10 times the same diamond to gia, to hrd & to igi and you'll understand.
regarding different grading results between gia, hrd & igi:
my experience tells me:
1)gia is a little stricter in high clarities (vvs & if)compared to the hrd.
2)hrd is a little easier between vvs-vs than igi.
3)hrd is stricter in high colors (d,e,f) than gia & igi.
4)igi is stricter than hrd in low clarities (si and lower).
these are the most relevant differences and all the other grades should be identical in those 3 labs.
regarding your last question: i have been looking at igi certified goods in dubai, bombay, bangkok and tokyo (igi has a lab in all those cities) and i must say the grading was consistent and even a little strict at times.
whenever i order goods in india nowadays, they have to come with an igi consultation; very practical as this is reducing my commuting back & forward not to mention all my travelling expenses!!! regards, robbe
 

robbe

Shiny_Rock
Joined
Apr 24, 2003
Messages
147
dear cut nut, thank you for these 6 interesting grading comparaisons.
first, i would like to say that i have seen the oposite situation many times as well, that is, gia being easier than igi or hrd. i think one cannot make statistics and jump to conclusions based on 6 diamonds.
second, the point i was trying to make is that when resubmitting those 6 diamonds to gia and igi a second time, you'll find more inconsistency at gia.
lastly, i would like to ask you what year these were certified and what location, for both gia & igi?.
understand this; i regularly work with gia, igi & hrd; i see results of all 3 and i feel they are all 3 grading seriously. there are however other labs that i really have problems with as they are not serious about their work. i don't intend to name them but you & i know they're out there and no one seems to complain...
regards, robbe
 

Giangi

Ideal_Rock
Joined
Jan 23, 2003
Messages
2,530
I've found HRD to be quite stricter than GIA... IGI Antwerp works VERY well right now... Yes, sometimes they make mistakes, but let me say that 50-60% of GIA SI 2s are P 1s (or I1s) in my opinion.
IGI is a bit soft on IF, good on all other grades. On color they're quite good. I find them to be very good on fancy colors.
 

Anthonyd

Rough_Rock
Joined
Oct 10, 2004
Messages
48
how does HRD rate with cut? From what I have read they have less stringent rules than the american labs
 
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