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Heart|Natural|GIA

1.51ct G SI1 Heart Natural Diamond

VG • G/SI1 • GIA 6542906470

Certificate GIA 6542906470

Diamond specifications and retailer prices

From £3,976 GBP
As of November 4, 2026
Save £3,709 GBP (48%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £8,663 GBP at NZ Jewellers · As of October 21, 2026
View at NZ Jewellers

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 6542906470. Listed at 15 retailers as of November 4, 2026, with a 93% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
G
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6542906470
Dimensions6.72 × 7.94 × 4.73 mm
L/W Ratio1.18
Top View
6.72 mm7.94 mm1.51 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6542906470
Side View
Table 61.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 59.6%

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: £8,663 GBP|Low: £3,716 GBP|High: £8,663 GBP|Avg: £5,375 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
Retailer 16
November 6, 2026
Retailer 4£3,716 GBP
Retailer 15£3,976 GBP
Retailer 16£4,602 GBP
Retailer 12£4,693 GBP
Retailer 13£4,693 GBP
Retailer 14£4,693 GBP
Retailer 2£4,901 GBP
Retailer 7£5,275 GBP
Retailer 8£5,275 GBP
Retailer 5£5,352 GBP
Retailer 3£5,415 GBP
Retailer 6£5,446 GBP
Retailer 9£5,683 GBP
Retailer 10£6,382 GBP
Retailer 11£7,686 GBP
NZ Jewellers£8,663 GBP

37 data points across 16 retailers

15 retailers£3,976 GBP to £7,686 GBP

Retailer 1
-
£3,716 GBP
Price last confirmed 8 days ago
B+
Retailer 2
-
£3,976 GBP
View
B+
Retailer 3
-
£4,602 GBP
View
Retailer 4
-
£4,693 GBP
View
Price last confirmed 16 days ago
Retailer 5
-
£4,693 GBP
View
Price last confirmed 16 days ago
B+
Retailer 6
-
£4,901 GBP
View
B+
Retailer 7
-
£5,275 GBP
View
B+
Retailer 8
-
£5,275 GBP
View
B
Retailer 9
-
£5,352 GBP
View
Retailer 10
-
£5,415 GBP
View
Price last confirmed 15 days ago
B
Retailer 11
-
£5,446 GBP
View
B
Retailer 12
-
£5,683 GBP
View
B
Retailer 13
-
£6,382 GBP
View
B
Retailer 14
-
£7,686 GBP
View
Most Expensive
NZ Jewellers
91b28675-faf2-44ca-b624-bf80e65eaa5d · Oct 21
£8,663 GBP
$11,596 USD
View
Price last confirmed 16 days ago
14 more retailers have this diamond
Prices start from £3,976 GBPSave up to £3,709 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
£3,976 GBP