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Heart|Natural|GIA

0.31ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 3565586442

Certificate GIA 3565586442

Diamond specifications and retailer prices

From £367 GBP
As of November 2, 2026
Save £147 GBP (29%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £650 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 0.31ct natural heart diamond

This 0.31ct natural heart sits in the sub-half-carat band, graded G 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 3565586442. Listed at 6 retailers as of November 2, 2026, with a 40% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.31
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 3565586442
Dimensions4.23 × 4.67 × 2.68 mm
L/W Ratio1.10
Key to symbols
Crystal, Cloud
Top View
4.23 mm4.67 mm0.31 ctG / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 3565586442
Side View
Table 62.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 57.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £650 GBP|Low: £345 GBP|High: £657 GBP|Avg: £451 GBP|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 2£367 GBP
Retailer 4£386 GBP
Retailer 5£398 GBP
Retailer 6£405 GBP
Retailer 3£514 GBP
MOH London£650 GBP

21 data points across 6 retailers

6 retailers£367 GBP to £514 GBP

B+
Cheapest Retailer
-
£367 GBP
B
Retailer 2
-
£386 GBP
View
B
Retailer 3
-
£398 GBP
$534 USD
View
B
Retailer 4
-
£405 GBP
$544 USD
View
B
Retailer 5
-
£514 GBP
€657 EUR
View
Most Expensive
MOH London
B24D2D10D · Nov 2
£650 GBP
View
Price under review
5 more retailers have this diamond
Prices start from £367 GBPSave up to £147 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.

B+
0.31ct Heart
£367 GBP