Heart|Natural|GIA

0.51ct F SI1 Heart Natural Diamond

EX • F/SI1 • GIA 6525804276

Certificate GIA 6525804276

Diamond specifications and retailer prices

From £391 GBP
As of November 1, 2026
Save £200 GBP (34%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,336 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.51ct natural heart diamond

This 0.51ct natural heart sits in the half to three-quarter carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6525804276. Listed at 16 retailers as of October 31, 2026, with a 51% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6525804276
Dimensions4.76 × 5.49 × 3.34 mm
L/W Ratio1.15
Top View
4.76 mm5.49 mm0.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6525804276
Side View
Table 61.0%CrownGirdlePavilionCulet: NoneDepth 61.0%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: £1,336 GBP|Low: £314 GBP|High: £1,336 GBP|Avg: £587 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 1, 2026
Retailer 10£316 GBP
Retailer 2£391 GBP
Retailer 4£393 GBP
Retailer 5£426 GBP
Retailer 3£459 GBP
Retailer 14£459 GBP
Retailer 6£492 GBP
Retailer 8£522 GBP
Retailer 11£524 GBP
Retailer 12£533 GBP
Retailer 15£572 GBP
Retailer 7£640 GBP
Retailer 9£657 GBP
Retailer 13£985 GBP
NZ Jewellers£1,336 GBP

29 data points across 15 retailers

16 retailers£391 GBP to £592 GBP

Retailer 1
-
£316 GBP
Price last confirmed 8 days ago
B+
Retailer 2
-
£391 GBP
View
Retailer 3
-
£426 GBP
View
Price last confirmed 9 days ago
Retailer 4
-
£459 GBP
View
Price last confirmed 9 days ago
Retailer 5
-
£459 GBP
View
Price last confirmed 9 days ago
B
Retailer 6
-
£492 GBP
View
Retailer 7
-
£492 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£522 GBP
View
Retailer 9
-
£524 GBP
View
Price last confirmed 8 days ago
Retailer 10
-
£533 GBP
View
Price last confirmed 8 days ago
Retailer 11
-
£572 GBP
View
Price last confirmed 5 days ago
B
Retailer 12
-
£592 GBP
View
Retailer 13
-
£640 GBP
View
Price last confirmed 34 days ago
Retailer 14
-
£657 GBP
View
Price last confirmed 8 days ago
Retailer 15
-
£985 GBP
View
Price last confirmed 13 days ago
Most Expensive
NZ Jewellers
83a05a61-9849-4b5b-bd93-f7104d6a2321 · Oct 30
£1,336 GBP
$1,788 USD
View
Price under review
15 more retailers have this diamond
Prices start from £391 GBPSave up to £200 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
£391 GBP