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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 1543577711

Certificate GIA 1543577711

Diamond specifications and retailer prices

From £2,242 GBP
HK$23,500 HKD
As of November 2, 2026
Save £2,736 GBP (55%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £5,737 GBP at NZ Jewellers · As of September 30, 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 1543577711. Listed at 17 retailers as of October 29, 2026, with a 122% 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
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1543577711
Dimensions7.23 × 7.94 × 4.63 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Cloud, Feather, Crystal, Cavity, Needle
Top View
7.23 mm7.94 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1543577711
Side View
Table 63.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.3%

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: £2,387 GBP|Low: £2,242 GBP|High: £5,308 GBP|Avg: £3,146 GBP|-11.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 3£2,242 GBP
Retailer 1£2,387 GBP
Retailer 6£2,714 GBP
Retailer 2£2,846 GBP
Retailer 9£2,915 GBP
Retailer 7£3,008 GBP
Retailer 5£3,050 GBP
Retailer 10£3,085 GBP
Retailer 4£3,327 GBP
Retailer 8£4,977 GBP

39 data points across 10 retailers

17 retailers£2,242 GBP to £4,977 GBP

A
Cheapest Retailer
-
£2,242 GBP
HK$23,500 HKD
A
Retailer 2
-
£2,387 GBP
₹305,107 INR
View
A
Retailer 3
-
£2,714 GBP
$3,642 USD
View
Final sale: no returns
A
Retailer 4
-
£2,846 GBP
SGD 5,161 SGD
View
A
Retailer 5
-
£2,915 GBP
SGD 5,286 SGD
View
A
Retailer 6
-
£3,008 GBP
View
B+
Retailer 7
-
£3,031 GBP
$4,067 USD
View
B+
Retailer 8
-
£3,050 GBP
$4,093 USD
View
B+
Retailer 9
-
£3,085 GBP
$4,140 USD
View
B+
Retailer 10
-
£3,220 GBP
A$6,648 AUD
View
Retailer 11
-
£3,293 GBP
$4,419 USD
View
Price last confirmed 25 days ago
Retailer 12
-
£3,293 GBP
$4,419 USD
View
Price last confirmed 32 days ago
Retailer 13
-
£3,293 GBP
$4,419 USD
View
Price last confirmed 25 days ago
B+
Retailer 14
-
£3,327 GBP
€4,252 EUR
View
Retailer 15
-
£3,800 GBP
$5,099 USD
View
Price last confirmed 34 days ago
B
Retailer 16
-
£4,977 GBP
View
Most Expensive
NZ Jewellers
ee8781a8-47d7-4023-85f6-2e41dd61f5b5 · Sep 30
£5,737 GBP
$7,699 USD
View
Price last confirmed 33 days ago
16 more retailers have this diamond
Prices start from £2,242 GBPSave up to £2,736 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
£2,242 GBP