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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 6552596091

Certificate GIA 6552596091

Diamond specifications and retailer prices

From £2,127 GBP
HK$22,300 HKD
As of November 2, 2026
Save £2,576 GBP (55%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,934 GBP at NZ Jewellers · As of October 18, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552596091. Listed at 13 retailers as of November 2, 2026, with a 121% 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

1.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552596091
Dimensions7.07 × 8.05 × 4.73 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle, Indented Natural
Top View
7.07 mm8.05 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552596091
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 58.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £4,704 GBP|Low: £2,118 GBP|High: £5,230 GBP|Avg: £3,048 GBP|-9.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 3£2,127 GBP
Retailer 2£2,264 GBP
Retailer 5£2,596 GBP
Retailer 7£2,705 GBP
Retailer 8£2,838 GBP
Retailer 4£2,921 GBP
Retailer 6£2,939 GBP
Retailer 1£4,704 GBP

46 data points across 8 retailers

13 retailers£2,127 GBP to £4,704 GBP

A
Cheapest Retailer
-
£2,127 GBP
HK$22,300 HKD
A
Retailer 2
-
£2,264 GBP
₹289,349 INR
View
A
Retailer 3
-
£2,596 GBP
$3,484 USD
View
Final sale: no returns
A
Retailer 4
-
£2,705 GBP
SGD 4,906 SGD
View
Retailer 5
-
£2,832 GBP
$3,800 USD
View
Price last confirmed 17 days ago
Retailer 6
-
£2,832 GBP
$3,800 USD
View
Price last confirmed 15 days ago
A
Retailer 7
-
£2,838 GBP
$3,808 USD
View
A
Retailer 8
-
£2,921 GBP
$3,920 USD
View
A
Retailer 9
-
£2,939 GBP
View
Retailer 10
-
£2,941 GBP
$3,946 USD
View
Price last confirmed 16 days ago
Retailer 11
-
£3,268 GBP
$4,385 USD
View
Price last confirmed 14 days ago
Retailer 12
-
£4,704 GBP
View
Most Expensive
NZ Jewellers
c725a9b8-881d-4e8d-8d4d-ccdb7f702b80 · Oct 18
£4,934 GBP
$6,621 USD
View
Price last confirmed 15 days ago
12 more retailers have this diamond
Prices start from £2,127 GBPSave up to £2,576 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.

A
1.51ct Heart
£2,127 GBP