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Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

ID • I/SI1 • GIA 6552652410

Certificate GIA 6552652410

Diamond specifications and retailer prices

From £3,102 GBP
As of November 6, 2026
Save £3,417 GBP (52%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £6,798 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 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 6552652410. Listed at 16 retailers as of November 4, 2026, with a 110% 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552652410
Dimensions7.87 × 6.97 × 4.55 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Needle
Top View
7.87 mm6.97 mm1.51 ctI / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552652410
Side View
Table 61.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 57.9%

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: £6,798 GBP|Low: £2,832 GBP|High: £6,798 GBP|Avg: £4,561 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
November 6, 2026
Retailer 4£3,102 GBP
Retailer 5£3,399 GBP
Retailer 3£3,683 GBP
Retailer 2£3,873 GBP
Retailer 6£3,985 GBP
Retailer 10£4,169 GBP
Retailer 11£4,169 GBP
Retailer 13£4,249 GBP
Retailer 12£4,303 GBP
Retailer 7£4,619 GBP
Retailer 8£5,007 GBP
Retailer 9£6,519 GBP
NZ Jewellers£6,798 GBP

38 data points across 13 retailers

16 retailers£3,102 GBP to £6,519 GBP

A
Cheapest Retailer
-
£3,102 GBP
A
Retailer 2
-
£3,116 GBP
View
B+
Retailer 3
-
£3,676 GBP
View
Retailer 4
-
£3,683 GBP
View
Price last confirmed 18 days ago
Retailer 5
-
£3,683 GBP
View
Price last confirmed 22 days ago
B+
Retailer 6
-
£3,873 GBP
View
B+
Retailer 7
-
£3,985 GBP
View
B+
Retailer 8
-
£4,169 GBP
View
B+
Retailer 9
-
£4,169 GBP
View
B+
Retailer 10
-
£4,213 GBP
View
Retailer 11
-
£4,249 GBP
View
Price last confirmed 17 days ago
B
Retailer 12
-
£4,303 GBP
View
B+
Retailer 13
-
£4,619 GBP
View
B
Retailer 14
-
£5,007 GBP
View
B
Retailer 15
-
£6,519 GBP
View
Most Expensive
NZ Jewellers
5f69c31b-1f01-42cc-8698-0ea82b4976e0 · Oct 21
£6,798 GBP
$9,099 USD
View
Price last confirmed 16 days ago
15 more retailers have this diamond
Prices start from £3,102 GBPSave up to £3,417 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
£3,102 GBP