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Heart|Natural|GIA

1.51ct D SI2 Heart Natural Diamond

ID • D/SI2 • GIA 2231718566

Certificate GIA 2231718566

Diamond specifications and retailer prices

From £3,352 GBP
As of November 1, 2026
Save £2,846 GBP (46%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £6,198 GBP at NZ Jewellers · As of October 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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2231718566. Listed at 6 retailers as of October 30, 2026, with prices from £3,352 to £6,198, a £2,846 spread on the same certified stone. NZ Jewellers lists it at £6,198. 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
D
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.42°
Pavilion angle42.37°
OriginNatural
Grading LabGIA
CertificateGIA 2231718566
Dimensions6.75 × 8.02 × 4.94 mm
L/W Ratio1.19
Girdle conditionThick
Key to symbols
Crystal, Feather, Knot, Needle
Top View
6.75 mm8.02 mm1.51 ctD / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2231718566
Side View
Table 61.0%Crown 37.42°Girdle: STK-THKPavilion 42.37°Culet: NoneDepth 61.6%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: £6,198 GBP|Low: £3,289 GBP|High: £6,242 GBP|Avg: £4,245 GBP|-0.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 8£3,289 GBP
Retailer 2£3,352 GBP
Retailer 5£3,558 GBP
Retailer 6£3,558 GBP
Retailer 7£3,657 GBP
Retailer 9£3,808 GBP
Retailer 11£4,125 GBP
Retailer 3£4,448 GBP
Retailer 10£4,452 GBP
Retailer 4£5,666 GBP
NZ Jewellers£6,198 GBP

31 data points across 11 retailers

6 retailers£3,352 GBP to £6,198 GBP

A
Cheapest Retailer
-
£3,352 GBP
A
Retailer 2
-
£3,558 GBP
$4,767 USD
View
A
Retailer 3
-
£3,558 GBP
$4,767 USD
View
A
Retailer 4
-
£3,657 GBP
$4,900 USD
View
B+
Retailer 5
-
£5,666 GBP
View
Most Expensive
B+
NZ Jewellers
70efa35e-7227-4311-82c0-9c3eb24d02ea · Oct 30
£6,198 GBP
$8,305 USD
View
5 more retailers have this diamond
Prices start from £3,352 GBPSave up to £2,846 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
£3,352 GBP