CaratHunter
Plans
Heart|Natural|GIA

1.31ct G SI2 Heart Natural Diamond

FR • G/SI2 • GIA 6531940851

Certificate GIA 6531940851

Diamond specifications and retailer prices

From £1,911 GBP
SGD 3,461 SGD
As of October 31, 2026
Save £1,846 GBP (49%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £4,433 GBP at NZ Jewellers · As of September 20, 2026
View at NZ Jewellers

About this 1.31ct natural heart diamond

This 1.31ct natural heart sits in the one-and-a-quarter to one-and-a-half carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6531940851. Listed at 5 retailers as of October 31, 2026, with a 97% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.31
Carat
G
Colour
SI2
Clarity
Fair
Cut (retailer stated)

Specifications

Cut (retailer stated)Fair
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6531940851
Dimensions7.34 × 6.34 × 4.06 mm
L/W Ratio1.16
Top View
7.34 mm6.34 mm1.31 ctG / SI2
OriginNatural
CutFair
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6531940851
Side View
Table 65.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 64.0%

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 31
Current: £3,757 GBP|Low: £1,911 GBP|High: £4,430 GBP|Avg: £2,613 GBP|-11.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 2£1,911 GBP
Retailer 5£1,935 GBP
Retailer 3£2,178 GBP
Retailer 9£2,263 GBP
Retailer 4£2,575 GBP
Retailer 8£2,585 GBP
Retailer 6£2,701 GBP
Retailer 7£2,713 GBP
Retailer 1£3,757 GBP

16 data points across 9 retailers

5 retailers£1,911 GBP to £3,757 GBP

A
Cheapest Retailer
-
£1,911 GBP
SGD 3,461 SGD
B+
Retailer 2
-
£2,178 GBP
$2,918 USD
View
Retailer 3
-
£2,305 GBP
$3,089 USD
View
Price last confirmed 41 days ago
B
Retailer 4
-
£3,757 GBP
View
Most Expensive
NZ Jewellers
9d6dd1a0-4b55-4b47-9d7e-cd16334264a0 · Sep 20
£4,433 GBP
$5,940 USD
View
Price last confirmed 42 days ago
4 more retailers have this diamond
Prices start from £1,911 GBPSave up to £1,846 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
1.31ct Heart
£1,911 GBP