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Heart|Natural|GIA

1.51ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 6481518557

Certificate GIA 6481518557

Diamond specifications and retailer prices

From £4,973 GBP
As of November 4, 2026
Save £3,775 GBP (43%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £8,748 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two 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 6481518557. Listed at 19 retailers as of November 4, 2026, with prices from £4,973 to £8,748, a £3,775 spread on the same certified stone. MOH London lists it at £8,748. 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

1.51
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6481518557
Dimensions7.15 × 6.78 × 4.48 mm
L/W Ratio1.05
Top View
7.15 mm6.78 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6481518557
Side View
Table 60.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 66.0%

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 4
Current: £8,748 GBP|Low: £5,263 GBP|High: £8,866 GBP|Avg: £6,560 GBP|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 10£5,263 GBP
Retailer 3£5,263 GBP
Retailer 11£5,307 GBP
Retailer 2£5,883 GBP
Retailer 4£5,898 GBP
Retailer 9£6,035 GBP
Retailer 8£6,037 GBP
Retailer 5£6,838 GBP
Retailer 6£7,679 GBP
Retailer 7£8,691 GBP
MOH London£8,748 GBP

37 data points across 11 retailers

19 retailers£4,973 GBP to £8,748 GBP

B+
Cheapest Retailer
-
£4,973 GBP
B+
Retailer 2
-
£5,002 GBP
View
B+
Retailer 3
-
£5,263 GBP
View
Final sale: no returns
B+
Retailer 4
-
£5,263 GBP
View
Retailer 5
-
£5,263 GBP
View
Price last confirmed 30 days ago
B+
Retailer 6
-
£5,307 GBP
View
B+
Retailer 7
-
£5,606 GBP
View
B+
Retailer 8
-
£5,883 GBP
View
B+
Retailer 9
-
£5,898 GBP
View
B
Retailer 10
-
£6,035 GBP
View
Retailer 11
-
£6,037 GBP
View
Price last confirmed 16 days ago
B
Retailer 12
-
£6,052 GBP
View
B
Retailer 13
-
£6,052 GBP
View
B
Retailer 14
-
£6,253 GBP
View
B
Retailer 15
-
£6,336 GBP
View
B
Retailer 16
-
£6,838 GBP
View
B
Retailer 17
-
£7,679 GBP
View
Retailer 18
-
£8,691 GBP
View
Price last confirmed 10 days ago
Most Expensive
B
MOH London
7918798AC · Nov 4
£8,748 GBP
View
18 more retailers have this diamond
Prices start from £4,973 GBPSave up to £3,775 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+
1.51ct Heart
£4,973 GBP