Radiant|Natural|GIA

1.31ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 3545917765

Certificate GIA 3545917765

Diamond specifications and retailer prices

From £2,319 GBP
As of November 2, 2026
Save £1,657 GBP (42%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,102 GBP at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1.31ct natural radiant diamond

This 1.31ct natural radiant sits in the one-and-a-quarter to one-and-a-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 3545917765. Listed at 13 retailers as of November 2, 2026, with a 71% 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

1.31
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3545917765
Dimensions5.43 × 7.01 × 3.80 mm
L/W Ratio1.29
Top View
5.43 mm7.01 mm1.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3545917765
Side View
Table 70.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 70.0%

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: Nov 2
Current: £2,319 GBP|Low: £2,133 GBP|High: £3,998 GBP|Avg: £2,765 GBP|+0.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 10£2,133 GBP
Retailer 1£2,319 GBP
Retailer 7£2,452 GBP
Retailer 8£2,452 GBP
Retailer 9£2,534 GBP
Retailer 2£2,653 GBP
Retailer 6£2,759 GBP
Retailer 3£2,782 GBP
Retailer 5£2,922 GBP
Retailer 4£3,976 GBP

31 data points across 10 retailers

13 retailers£2,319 GBP to £3,976 GBP

Retailer 1
-
£2,133 GBP
$2,863 USD
Price last confirmed 32 days ago
Retailer 2
-
£2,215 GBP
$2,973 USD
View
Price last confirmed 33 days ago
A
Retailer 3
-
£2,319 GBP
View
A
Retailer 4
-
£2,452 GBP
$3,290 USD
View
A
Retailer 5
-
£2,452 GBP
$3,290 USD
View
Retailer 6
-
£2,461 GBP
$3,303 USD
View
Price last confirmed 31 days ago
A
Retailer 7
-
£2,483 GBP
$3,332 USD
View
A
Retailer 8
-
£2,534 GBP
$3,400 USD
View
A
Retailer 9
-
£2,653 GBP
$3,560 USD
View
B+
Retailer 10
-
£2,782 GBP
€3,556 EUR
View
B+
Retailer 11
-
£2,922 GBP
ZAR 63,352 ZAR
View
B
Retailer 12
-
£3,976 GBP
View
Most Expensive
NZ Jewellers
2cef6053-688a-43d5-8d8e-521b14a6900e · Sep 29
£4,102 GBP
$5,505 USD
View
Price last confirmed 34 days ago
12 more retailers have this diamond
Prices start from £2,319 GBPSave up to £1,657 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 Radiant
£2,319 GBP