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Heart|Natural|GIA

1.51ct D SI2 Heart Natural Diamond

EX • D/SI2 • GIA 6421555574

Certificate GIA 6421555574

Diamond specifications and retailer prices

From £5,280 GBP
$7,075 USD
As of October 30, 2026
Save £6,056 GBP (53%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £11,337 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 6421555574. Listed at 9 retailers as of October 30, 2026, with prices from £5,280 to £11,337, a £6,056 spread on the same certified stone. NZ Jewellers lists it at £11,337. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6421555574
Dimensions7.22 × 7.86 × 4.32 mm
L/W Ratio1.09
Top View
7.22 mm7.86 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6421555574
Side View
Table 61.0%CrownGirdlePavilionCulet: NoneDepth 55.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £9,446 GBP|Low: £5,280 GBP|High: £9,560 GBP|Avg: £7,086 GBP|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 4£5,280 GBP
Retailer 5£6,235 GBP
Retailer 2£6,385 GBP
Retailer 6£7,086 GBP
Retailer 3£7,407 GBP
Retailer 1£9,446 GBP

41 data points across 6 retailers

9 retailers£5,280 GBP to £11,337 GBP

B+
Cheapest Retailer
-
£5,280 GBP
$7,075 USD
B+
Retailer 2
-
£6,141 GBP
$8,228 USD
View
B+
Retailer 3
-
£6,235 GBP
$8,354 USD
View
B+
Retailer 4
-
£6,385 GBP
View
B
Retailer 5
-
£6,927 GBP
$9,281 USD
View
B
Retailer 6
-
£7,086 GBP
$9,494 USD
View
B
Retailer 7
-
£7,407 GBP
€9,452 EUR
View
B
Retailer 8
-
£9,446 GBP
View
Most Expensive
B
NZ Jewellers
52ea816d-be4c-430b-aec3-b2532433cb30 · Oct 30
£11,337 GBP
$15,190 USD
View
8 more retailers have this diamond
Prices start from £5,280 GBPSave up to £6,056 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.

B+
1.51ct Heart
£5,280 GBP