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Oval|Natural|GIA

1.31ct K SI1 Oval Natural Diamond

EX • K/SI1 • GIA 6425979052

Certificate GIA 6425979052

Diamond specifications and retailer prices

From £1,730 GBP
As of November 6, 2026
Save £2,436 GBP (58%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £4,166 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 K 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 6425979052. Listed at 18 retailers as of November 5, 2026, with prices from £1,730 to £4,166, a £2,436 spread on the same certified stone. NZ Jewellers lists it at £4,166. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6425979052
Dimensions8.22 × 6.06 × 3.90 mm
L/W Ratio1.36
Top View
8.22 mm6.06 mm1.31 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6425979052
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 64.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,235 GBP|Low: £1,730 GBP|High: £4,046 GBP|Avg: £2,562 GBP|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 2£1,730 GBP
Retailer 8£1,759 GBP
Retailer 7£2,173 GBP
Retailer 1£2,235 GBP
Retailer 9£2,238 GBP
Retailer 3£2,459 GBP
Retailer 6£2,799 GBP
Retailer 4£2,918 GBP
Retailer 5£3,987 GBP

32 data points across 9 retailers

18 retailers£1,730 GBP to £4,166 GBP

A
Cheapest Retailer
-
£1,730 GBP
A
Retailer 2
-
£1,759 GBP
View
Retailer 3
-
£2,170 GBP
View
Price last confirmed 18 days ago
B+
Retailer 4
-
£2,173 GBP
View
B+
Retailer 5
-
£2,235 GBP
View
B+
Retailer 6
-
£2,238 GBP
View
Retailer 7
-
£2,391 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£2,391 GBP
View
B+
Retailer 9
-
£2,443 GBP
View
B+
Retailer 10
-
£2,459 GBP
View
B
Retailer 11
-
£2,483 GBP
View
B
Retailer 12
-
£2,498 GBP
View
B
Retailer 13
-
£2,759 GBP
View
B+
Retailer 14
-
£2,799 GBP
View
B
Retailer 15
-
£2,918 GBP
View
B
Retailer 16
-
£3,143 GBP
View
B
Retailer 17
-
£3,987 GBP
View
Most Expensive
B
NZ Jewellers
de510069-ca62-4433-affb-0ee35ed7147d · Nov 5
£4,166 GBP
$5,576 USD
View
17 more retailers have this diamond
Prices start from £1,730 GBPSave up to £2,436 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 Oval
£1,730 GBP