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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 €514 EUR
HK$4,500 HKD
As of October 27, 2026
10 retailers carry this diamond
Most expensive: €1,316 EUR 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

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: €1,316 EUR|Low: €382 EUR|High: €1,471 EUR|Avg: €722 EUR|+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€459 EUR
Retailer 11€473 EUR
Retailer 9€475 EUR
Retailer 7€514 EUR
Retailer 6€608 EUR
Retailer 2€665 EUR
Retailer 10€735 EUR
Retailer 4€806 EUR
Retailer 5€833 EUR
Retailer 3€905 EUR
MOH London€1,316 EUR

36 data points across 11 retailers

10 retailers

Retailer 1
-
€459 EUR
$515 USD
Price last confirmed 11 days ago
Retailer 2
-
€473 EUR
$530 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
€514 EUR
HK$4,500 HKD
View
Retailer 4
-
€608 EUR
$682 USD
View
Price last confirmed 7 days ago
Retailer 5
-
€665 EUR
£587 GBP
View
Price last confirmed 7 days ago
Retailer 6
-
€735 EUR
$824 USD
View
Price last confirmed 7 days ago
Retailer 7
-
€806 EUR
£712 GBP
View
Price last confirmed 7 days ago
Retailer 8
-
€833 EUR
View
Price last confirmed 8 days ago
Retailer 9
-
€905 EUR
A$1,561 AUD
View
Price last confirmed 29 days ago
Most Expensive
MOH London
BDEDAD885 · Oct 25
€1,316 EUR
£1,162 GBP
View
Price last confirmed 8 days ago
9 more retailers have this diamond
Prices start from €514 EUR

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
€514 EUR