CaratHunter
Plans
Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 6555506948

Certificate GIA 6555506948

Diamond specifications and retailer prices

From £2,601 GBP
As of November 6, 2026
Save £3,485 GBP (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £6,086 GBP at NZ Jewellers · As of November 5, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555506948. Listed at 18 retailers as of November 5, 2026, with prices from £2,601 to £6,086, a £3,485 spread on the same certified stone. NZ Jewellers lists it at £6,086. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555506948
Dimensions7.00 × 7.88 × 4.58 mm
L/W Ratio1.13
Girdle conditionFaceted
Top View
7.00 mm7.88 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555506948
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NDepth 58.2%

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 6
Current: £6,086 GBP|Low: £2,563 GBP|High: £6,212 GBP|Avg: £3,678 GBP|-2.0%
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
Retailer 17
November 7, 2026
Retailer 16£2,601 GBP
Retailer 4£2,612 GBP
Retailer 14£2,777 GBP
Retailer 6£2,917 GBP
Retailer 8£2,920 GBP
Retailer 3£2,921 GBP
Retailer 10£2,956 GBP
Retailer 9£3,007 GBP
Retailer 15£3,235 GBP
Retailer 2£3,246 GBP
Retailer 11£3,296 GBP
Retailer 5£3,349 GBP
Retailer 12£4,262 GBP
Retailer 17£4,430 GBP
Retailer 7£5,420 GBP
Retailer 13£5,548 GBP
NZ Jewellers£6,086 GBP

22 data points across 17 retailers

18 retailers£2,601 GBP to £6,086 GBP

A
Cheapest Retailer
-
£2,601 GBP
A
Retailer 2
-
£2,612 GBP
View
A
Retailer 3
-
£2,777 GBP
View
A
Retailer 4
-
£2,917 GBP
View
A
Retailer 5
-
£2,920 GBP
View
A
Retailer 6
-
£2,921 GBP
View
Final sale: no returns
A
Retailer 7
-
£2,956 GBP
View
A
Retailer 8
-
£3,007 GBP
View
A
Retailer 9
-
£3,235 GBP
View
A
Retailer 10
-
£3,246 GBP
View
A
Retailer 11
-
£3,296 GBP
View
A
Retailer 12
-
£3,349 GBP
View
Retailer 13
-
£3,765 GBP
View
Price last confirmed 29 days ago
B+
Retailer 14
-
£4,262 GBP
View
B
Retailer 15
-
£4,430 GBP
View
B
Retailer 16
-
£5,420 GBP
View
B
Retailer 17
-
£5,548 GBP
View
Most Expensive
B
NZ Jewellers
28ec3ddb-0863-4b50-998a-7b353d1e8e5b · Nov 5
£6,086 GBP
$8,146 USD
View
17 more retailers have this diamond
Prices start from £2,601 GBPSave up to £3,485 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
£2,601 GBP