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Heart|Natural|GIA

1.51ct L SI1 Heart Natural Diamond

EX • L/SI1 • GIA 7536538529

Certificate GIA 7536538529

Diamond specifications and retailer prices

From £1,366 GBP
As of November 7, 2026
Save £2,111 GBP (61%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,478 GBP at NZ Jewellers · As of November 3, 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 L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7536538529. Listed at 6 retailers as of November 3, 2026, with prices from £1,366 to £3,478, a £2,111 spread on the same certified stone. NZ Jewellers lists it at £3,478. 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
L
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle35.33°
Pavilion angle41.58°
OriginNatural
Grading LabGIA
CertificateGIA 7536538529
Dimensions7.11 × 7.98 × 4.65 mm
L/W Ratio1.12
Girdle conditionVery Thick
Key to symbols
Feather, Crystal, Etch Channel, Needle, Indented Natural
Top View
7.11 mm7.98 mm1.51 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7536538529
Side View
Table 63.0%Crown 35.33°GirdlePavilion 41.58°CuletDepth 58.2%

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 7
Current: £3,478 GBP|Low: £1,327 GBP|High: £3,539 GBP|Avg: £1,772 GBP|-1.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 2£1,366 GBP
Retailer 3£1,409 GBP
Retailer 6£1,426 GBP
Retailer 7£1,447 GBP
Retailer 4£1,461 GBP
Retailer 5£1,492 GBP
NZ Jewellers£3,478 GBP

40 data points across 7 retailers

6 retailers£1,366 GBP to £3,478 GBP

A
Cheapest Retailer
-
£1,366 GBP
A
Retailer 2
-
£1,409 GBP
View
A
Retailer 3
-
£1,426 GBP
View
A
Retailer 4
-
£1,461 GBP
View
B+
Retailer 5
-
£1,492 GBP
View
Most Expensive
C
NZ Jewellers
1cedb843-b85c-42c6-83fc-f902cef6d3da · Nov 3
£3,478 GBP
$4,655 USD
View
5 more retailers have this diamond
Prices start from £1,366 GBPSave up to £2,111 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
£1,366 GBP