CaratHunter
Plans
Oval|Natural|GIA

1.31ct L SI1 Oval Natural Diamond

ID • L/SI1 • GIA 5

Certificate GIA 5

Diamond specifications and retailer prices

From £1,563 GBP
As of November 6, 2026
Save £2,502 GBP (62%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £4,065 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.31ct natural oval diamond

This 1.31ct natural oval sits in the one-and-a-quarter to one-and-a-half carat band, graded L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 7 retailers as of November 5, 2026, with prices from £1,563 to £4,065, a £2,502 spread on the same certified stone. NZ Jewellers lists it at £4,065. 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
L
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5
Dimensions9.33 × 5.83 × 3.61 mm
L/W Ratio1.60
Top View
9.33 mm5.83 mm1.31 ctL / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 61.9%

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 6
Current: £4,065 GBP|Low: £1,563 GBP|High: £4,065 GBP|Avg: £2,118 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
September 29, 2026
Retailer 3£1,563 GBP
Retailer 7£1,660 GBP
Retailer 4£1,762 GBP
Retailer 5£1,762 GBP
Retailer 2£1,843 GBP
Retailer 6£2,033 GBP
NZ Jewellers£4,065 GBP

2 data points across 7 retailers

7 retailers£1,563 GBP to £4,065 GBP

B+
Cheapest Retailer
-
£1,563 GBP
B+
Retailer 2
-
£1,660 GBP
View
Retailer 3
-
£1,762 GBP
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£1,762 GBP
View
B+
Retailer 5
-
£1,843 GBP
View
B
Retailer 6
-
£2,033 GBP
View
Most Expensive
B
NZ Jewellers
8821ad59-669b-4735-8369-c56815edc54b · Nov 5
£4,065 GBP
$5,441 USD
View
6 more retailers have this diamond
Prices start from £1,563 GBPSave up to £2,502 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+
1.31ct Oval
£1,563 GBP