CaratHunter
Plans
Heart|Natural|GIA

1.51ct H SI2 Heart Natural Diamond

EX • H/SI2 • GIA 3425738172

Certificate GIA 3425738172

Diamond specifications and retailer prices

From £2,896 GBP
₹370,145 INR
As of October 31, 2026
Save £4,787 GBP (62%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £7,684 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 H 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 3425738172. Listed at 15 retailers as of October 31, 2026, with prices from £2,896 to £7,684, a £4,787 spread on the same certified stone. Adiamor lists it at £7,684. 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
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3425738172
Dimensions6.85 × 7.73 × 4.65 mm
L/W Ratio1.13
Top View
6.85 mm7.73 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 3425738172
Side View
Table 59.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 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 31
Current: £3,899 GBP|Low: £2,765 GBP|High: £6,683 GBP|Avg: £4,313 GBP|+1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 3£2,896 GBP
Retailer 4£2,900 GBP
Retailer 5£3,688 GBP
Retailer 1£3,899 GBP
Retailer 6£3,996 GBP
Retailer 7£3,996 GBP
Retailer 2£6,364 GBP
Retailer 8£6,683 GBP

46 data points across 8 retailers

15 retailers£2,896 GBP to £7,684 GBP

A
Cheapest Retailer
-
£2,896 GBP
₹370,145 INR
A
Retailer 2
-
£2,900 GBP
HK$30,400 HKD
View
B+
Retailer 3
-
£3,381 GBP
$4,537 USD
View
B+
Retailer 4
-
£3,485 GBP
$4,676 USD
View
Retailer 5
-
£3,686 GBP
SGD 6,684 SGD
View
Price last confirmed 7 days ago
B+
Retailer 6
-
£3,688 GBP
$4,949 USD
View
Final sale: no returns
B+
Retailer 7
-
£3,899 GBP
View
B+
Retailer 8
-
£3,996 GBP
$5,362 USD
View
B+
Retailer 9
-
£3,996 GBP
$5,362 USD
View
B+
Retailer 10
-
£3,996 GBP
$5,362 USD
View
B+
Retailer 11
-
£4,110 GBP
$5,515 USD
View
B+
Retailer 12
-
£4,610 GBP
$6,187 USD
View
B
Retailer 13
-
£6,364 GBP
View
B
Retailer 14
-
£6,683 GBP
$8,968 USD
View
Most Expensive
B
Adiamor
D-64681383 · Nov 1
£7,684 GBP
$10,311 USD
View
14 more retailers have this diamond
Prices start from £2,896 GBPSave up to £4,787 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
£2,896 GBP