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Heart|Natural|GIA

0.51ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 6561393717

Certificate GIA 6561393717

Diamond specifications and retailer prices

From £463 GBP
As of November 6, 2026
Save £290 GBP (38%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £753 GBP at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

About this 0.51ct natural heart diamond

This 0.51ct natural heart sits in the half to three-quarter carat band, graded G 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 6561393717. Listed at 9 retailers as of November 6, 2026, with prices from £463 to £753, a £290 spread on the same certified stone. Wholesale Diamonds Direct lists it at £753. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle40.37°
Pavilion angle38.41°
OriginNatural
Grading LabGIA
CertificateGIA 6561393717
Dimensions4.74 × 5.49 × 3.26 mm
L/W Ratio1.16
Culet sizeNone
Top View
4.74 mm5.49 mm0.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6561393717
Side View
Table 58.0%Crown 40.37°Girdle: STK-THKPavilion 38.41°Culet: NoneDepth 59.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £738 GBP|Low: £463 GBP|High: £798 GBP|Avg: £622 GBP|-5.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Wholesale Diamonds Direct
November 6, 2026
Retailer 5£463 GBP
Retailer 8£504 GBP
Retailer 2£518 GBP
Retailer 3£534 GBP
Retailer 4£586 GBP
Retailer 7£592 GBP
Retailer 6£654 GBP
Retailer 1£738 GBP
Wholesale Diamonds Direct£753 GBP

41 data points across 9 retailers

9 retailers£463 GBP to £753 GBP

B+
Cheapest Retailer
-
£463 GBP
B+
Retailer 2
-
£504 GBP
View
B+
Retailer 3
-
£518 GBP
View
B+
Retailer 4
-
£534 GBP
View
B
Retailer 5
-
£586 GBP
View
B
Retailer 6
-
£592 GBP
View
B
Retailer 7
-
£654 GBP
View
B
Retailer 8
-
£738 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
545794721 · Nov 6
£753 GBP
$1,008 USD
View
8 more retailers have this diamond
Prices start from £463 GBPSave up to £290 GBP

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.

B+
0.51ct Heart
£463 GBP