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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 2427009307

Certificate GIA 2427009307

Diamond specifications and retailer prices

From £2,681 GBP
₹342,125 INR
As of October 31, 2026
Save £4,425 GBP (62%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £7,106 GBP at Adiamor · As of November 1, 2026
View at Adiamor

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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2427009307. Listed at 15 retailers as of October 31, 2026, with prices from £2,681 to £7,106, a £4,425 spread on the same certified stone. Adiamor lists it at £7,106. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2427009307
Dimensions6.57 × 8.10 × 4.46 mm
L/W Ratio1.23
Top View
6.57 mm8.10 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2427009307
Side View
Table 62.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 55.1%

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 31
Current: £3,676 GBP|Low: £2,557 GBP|High: £6,375 GBP|Avg: £3,592 GBP|+1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 4£2,681 GBP
Retailer 5£2,684 GBP
Retailer 6£2,925 GBP
Retailer 3£3,124 GBP
Retailer 7£3,412 GBP
Retailer 1£3,676 GBP
Retailer 8£3,697 GBP
Retailer 2£5,889 GBP

41 data points across 8 retailers

15 retailers£2,681 GBP to £7,106 GBP

A
Cheapest Retailer
-
£2,681 GBP
₹342,125 INR
A
Retailer 2
-
£2,684 GBP
HK$28,100 HKD
View
A
Retailer 3
-
£2,925 GBP
A$6,029 AUD
View
A
Retailer 4
-
£3,124 GBP
$4,186 USD
View
B+
Retailer 5
-
£3,157 GBP
$4,230 USD
View
B+
Retailer 6
-
£3,412 GBP
$4,572 USD
View
Final sale: no returns
B+
Retailer 7
-
£3,676 GBP
View
B+
Retailer 8
-
£3,697 GBP
$4,954 USD
View
B+
Retailer 9
-
£3,697 GBP
$4,954 USD
View
B+
Retailer 10
-
£3,697 GBP
$4,954 USD
View
B+
Retailer 11
-
£3,810 GBP
$5,105 USD
View
B
Retailer 12
-
£4,266 GBP
$5,716 USD
View
B
Retailer 13
-
£5,889 GBP
View
B
Retailer 14
-
£6,441 GBP
$8,630 USD
View
Most Expensive
B
Adiamor
D-64680553 · Nov 1
£7,106 GBP
$9,521 USD
View
14 more retailers have this diamond
Prices start from £2,681 GBPSave up to £4,425 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
£2,681 GBP