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Heart|Natural|GIA

1.25ct H SI2 Heart Natural Diamond

EX • H/SI2 • GIA 1553638557

Certificate GIA 1553638557

Diamond specifications and retailer prices

From £1,292 GBP
$1,734 USD
As of November 1, 2026
Save £2,167 GBP (63%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,459 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.25ct natural heart diamond

This 1.25ct natural heart sits in the one-and-a-quarter to one-and-a-half 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 1553638557. Listed at 14 retailers as of October 30, 2026, with prices from £1,292 to £3,459, a £2,167 spread on the same certified stone. NZ Jewellers lists it at £3,459. 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

1.25
Carat
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.98°
OriginNatural
Grading LabGIA
CertificateGIA 1553638557
Dimensions6.63 × 7.51 × 4.22 mm
L/W Ratio1.13
Culet sizeNone
Key to symbols
Twinning Wisp, Cloud, Crystal, Feather, Needle, Indented Natural, Natural
Top View
6.63 mm7.51 mm1.25 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1553638557
Side View
Table 58.0%Crown 36.98°Girdle: MED-VTKPavilionCulet: NoneDepth 56.2%

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: Nov 1
Current: £3,459 GBP|Low: £1,292 GBP|High: £3,512 GBP|Avg: £1,973 GBP|-1.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 2, 2026
Retailer 14£1,292 GBP
Retailer 4£1,309 GBP
Retailer 2£1,402 GBP
Retailer 6£1,418 GBP
Retailer 12£1,418 GBP
Retailer 11£1,465 GBP
Retailer 3£1,475 GBP
Retailer 5£1,484 GBP
Retailer 13£1,521 GBP
Retailer 10£1,554 GBP
Retailer 7£1,555 GBP
Retailer 9£1,636 GBP
Retailer 8£2,498 GBP
NZ Jewellers£3,459 GBP

41 data points across 14 retailers

14 retailers£1,292 GBP to £3,459 GBP

A
Cheapest Retailer
-
£1,292 GBP
$1,734 USD
A
Retailer 2
-
£1,309 GBP
$1,756 USD
View
Final sale: no returns
A
Retailer 3
-
£1,402 GBP
View
A
Retailer 4
-
£1,418 GBP
$1,903 USD
View
A
Retailer 5
-
£1,418 GBP
$1,903 USD
View
A
Retailer 6
-
£1,465 GBP
$1,966 USD
View
A
Retailer 7
-
£1,475 GBP
$1,980 USD
View
A
Retailer 8
-
£1,484 GBP
$1,991 USD
View
A
Retailer 9
-
£1,521 GBP
$2,041 USD
View
A
Retailer 10
-
£1,554 GBP
$2,085 USD
View
A
Retailer 11
-
£1,555 GBP
View
A
Retailer 12
-
£1,636 GBP
$2,196 USD
View
B+
Retailer 13
-
£2,498 GBP
View
Most Expensive
B
NZ Jewellers
b6e459be-f91b-4c67-87a6-031833ab505e · Oct 30
£3,459 GBP
$4,642 USD
View
13 more retailers have this diamond
Prices start from £1,292 GBPSave up to £2,167 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
1.25ct Heart
£1,292 GBP