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Radiant|Natural|GIA

0.51ct H SI1 Radiant Natural Diamond

ID • H/SI1 • GIA 6551775683

Certificate GIA 6551775683

Diamond specifications and retailer prices

From $1,022 NZD
HK$4,500 HKD
As of October 27, 2026
10 retailers carry this diamond
Most expensive: $2,618 NZD at MOH London · As of October 25, 2026
View at MOH London

About this 0.51ct natural radiant diamond

This 0.51ct natural radiant sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551775683. Listed at 10 retailers as of October 27, 2026. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle60.92°
OriginNatural
Grading LabGIA
CertificateGIA 6551775683
Dimensions5.36 × 4.02 × 2.71 mm
L/W Ratio1.33
Culet sizeNone
Top View
5.36 mm4.02 mm0.51 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551775683
Side View
Table 66.0%Crown 35.6°Girdle: Very ThickPavilion 60.92°Culet: NDepth 67.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: $2,618 NZD|Low: $759 NZD|High: $2,927 NZD|Avg: $1,437 NZD|+9.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 26, 2026
Retailer 8$914 NZD
Retailer 11$940 NZD
Retailer 9$946 NZD
Retailer 7$1,022 NZD
Retailer 6$1,210 NZD
Retailer 2$1,323 NZD
Retailer 10$1,462 NZD
Retailer 4$1,604 NZD
Retailer 5$1,658 NZD
Retailer 3$1,801 NZD
MOH London$2,618 NZD

36 data points across 11 retailers

10 retailers

Retailer 1
-
$914 NZD
$515 USD
Price last confirmed 10 days ago
Retailer 2
-
$940 NZD
$530 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$1,022 NZD
HK$4,500 HKD
View
Retailer 4
-
$1,210 NZD
$682 USD
View
Price last confirmed 7 days ago
Retailer 5
-
$1,323 NZD
£587 GBP
View
Price last confirmed 7 days ago
Retailer 6
-
$1,462 NZD
$824 USD
View
Price last confirmed 7 days ago
Retailer 7
-
$1,604 NZD
£712 GBP
View
Price last confirmed 7 days ago
Retailer 8
-
$1,658 NZD
€890 EUR
View
Price last confirmed 8 days ago
Retailer 9
-
$1,801 NZD
A$1,561 AUD
View
Price last confirmed 29 days ago
Most Expensive
MOH London
BDEDAD885 · Oct 25
$2,618 NZD
£1,162 GBP
View
Price last confirmed 8 days ago
9 more retailers have this diamond
Prices start from $1,022 NZD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
0.51ct Radiant
$1,022 NZD