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Heart|Natural|GIA

0.40ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 1555940920

Certificate GIA 1555940920

Diamond specifications and retailer prices

From £207 GBP
₹26,382 INR
As of October 26, 2026
Save £451 GBP (69%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £658 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 0.4ct natural heart diamond

This 0.4ct natural heart sits in the sub-half-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555940920. Listed at 10 retailers as of October 26, 2026, with prices from £207 to £658, a £451 spread on the same certified stone. MOH London lists it at £658. 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

0.40
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555940920
Dimensions4.40 × 5.16 × 3.10 mm
L/W Ratio1.17
Girdle conditionThin to Slightly Thick
Key to symbols
Twinning Wisp, Feather
Top View
4.40 mm5.16 mm0.40 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555940920
Side View
Table 59.0%CrownGirdle: THN-STKPavilionCulet: NoneDepth 60.0%

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 26
Current: £658 GBP|Low: £206 GBP|High: £1,214 GBP|Avg: £461 GBP|-2.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 28, 2026
Retailer 4£207 GBP
Retailer 8£248 GBP
Retailer 5£284 GBP
Retailer 10£301 GBP
Retailer 9£311 GBP
Retailer 6£317 GBP
Retailer 2£501 GBP
Retailer 3£578 GBP
MOH London£658 GBP
Retailer 7£1,090 GBP

31 data points across 10 retailers

10 retailers£207 GBP to £658 GBP

A
Cheapest Retailer
-
£207 GBP
₹26,382 INR
A
Retailer 2
-
£248 GBP
HK$2,600 HKD
View
A
Retailer 3
-
£284 GBP
$381 USD
View
B+
Retailer 4
-
£301 GBP
SGD 545 SGD
View
B+
Retailer 5
-
£311 GBP
$417 USD
View
B+
Retailer 6
-
£317 GBP
$425 USD
View
B
Retailer 7
-
£501 GBP
View
B
Retailer 8
-
£578 GBP
View
Most Expensive
B
MOH London
AF0E4AFA2 · Oct 26
£658 GBP
View
8 more retailers have this diamond
Prices start from £207 GBPSave up to £451 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
0.40ct Heart
£207 GBP