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Heart|Natural|GIA

1.51ct E SI1 Heart Natural Diamond

EX • E/SI1 • GIA 6511530906

Certificate GIA 6511530906

Diamond specifications and retailer prices

From £4,000 GBP
As of October 30, 2026
Save £3,598 GBP (47%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £7,598 GBP at NZ Jewellers · As of October 27, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6511530906. Listed at 9 retailers as of October 27, 2026, with prices from £4,000 to £7,598, a £3,598 spread on the same certified stone. NZ Jewellers lists it at £7,598. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.52°
Pavilion angle41.99°
OriginNatural
Grading LabGIA
CertificateGIA 6511530906
Dimensions6.98 × 8.02 × 4.83 mm
L/W Ratio1.15
Top View
6.98 mm8.02 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6511530906
Side View
Table 61.0%Crown 36.52°Girdle: Slightly Thick to ThickPavilion 41.99°Culet: NDepth 60.2%

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: Oct 30
Current: £7,598 GBP|Low: £3,988 GBP|High: £7,598 GBP|Avg: £5,096 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 3£4,000 GBP
Retailer 2£4,170 GBP
Retailer 8£4,329 GBP
Retailer 4£4,443 GBP
Retailer 5£4,443 GBP
Retailer 9£4,491 GBP
Retailer 6£4,523 GBP
Retailer 7£6,581 GBP
NZ Jewellers£7,598 GBP

45 data points across 9 retailers

9 retailers£4,000 GBP to £7,598 GBP

A
Cheapest Retailer
-
£4,000 GBP
A
Retailer 2
-
£4,170 GBP
View
B+
Retailer 3
-
£4,329 GBP
$5,765 USD
View
A
Retailer 4
-
£4,443 GBP
$5,917 USD
View
A
Retailer 5
-
£4,443 GBP
$5,917 USD
View
Retailer 6
-
£4,491 GBP
A$9,201 AUD
View
Price last confirmed 20 days ago
B+
Retailer 7
-
£4,523 GBP
$6,023 USD
View
B+
Retailer 8
-
£6,581 GBP
View
Most Expensive
B
NZ Jewellers
8134b5e0-c12e-4565-9ea7-62757ff29826 · Oct 27
£7,598 GBP
$10,118 USD
View
8 more retailers have this diamond
Prices start from £4,000 GBPSave up to £3,598 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
£4,000 GBP