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Oval|Natural|GIA

1.51ct K SI1 Oval Natural Diamond

VG • K/SI1 • GIA 2386505851

Certificate GIA 2386505851

Diamond specifications and retailer prices

From £2,059 GBP
As of November 4, 2026
Save £2,613 GBP (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £4,672 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2386505851. Listed at 18 retailers as of November 4, 2026, with prices from £2,059 to £4,672, a £2,613 spread on the same certified stone. NZ Jewellers lists it at £4,672. 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

1.51
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2386505851
Dimensions8.31 × 6.36 × 4.20 mm
L/W Ratio1.31
Top View
8.31 mm6.36 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2386505851
Side View
Table 60.0%CrownGirdle: ThickPavilionCulet: NoneDepth 66.0%

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 4
Current: £4,672 GBP|Low: £1,804 GBP|High: £4,672 GBP|Avg: £2,895 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 6, 2026
Retailer 17£2,059 GBP
Retailer 18£2,112 GBP
Retailer 15£2,114 GBP
Retailer 10£2,118 GBP
Retailer 6£2,148 GBP
Retailer 13£2,156 GBP
Retailer 5£2,353 GBP
Retailer 9£2,429 GBP
Retailer 3£2,441 GBP
Retailer 16£2,522 GBP
Retailer 8£2,660 GBP
Retailer 11£2,775 GBP
Retailer 4£2,803 GBP
Retailer 2£2,944 GBP
Retailer 12£3,272 GBP
Retailer 7£3,872 GBP
Retailer 14£4,471 GBP
NZ Jewellers£4,672 GBP

42 data points across 18 retailers

18 retailers£2,059 GBP to £4,672 GBP

A
Cheapest Retailer
-
£2,059 GBP
A
Retailer 2
-
£2,112 GBP
View
A
Retailer 3
-
£2,114 GBP
View
A
Retailer 4
-
£2,148 GBP
View
A
Retailer 5
-
£2,156 GBP
View
B+
Retailer 6
-
£2,353 GBP
View
B+
Retailer 7
-
£2,429 GBP
View
B+
Retailer 8
-
£2,441 GBP
View
Retailer 9
-
£2,489 GBP
View
Price last confirmed 8 days ago
B+
Retailer 10
-
£2,522 GBP
View
B+
Retailer 11
-
£2,660 GBP
View
B+
Retailer 12
-
£2,775 GBP
View
B+
Retailer 13
-
£2,803 GBP
View
B+
Retailer 14
-
£2,944 GBP
View
B+
Retailer 15
-
£3,272 GBP
View
B
Retailer 16
-
£3,872 GBP
View
B
Retailer 17
-
£4,471 GBP
View
Most Expensive
B
NZ Jewellers
b0a8d4f0-f7b8-4c21-81cf-4c788d294640 · Nov 5
£4,672 GBP
$6,253 USD
View
17 more retailers have this diamond
Prices start from £2,059 GBPSave up to £2,613 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
1.51ct Oval
£2,059 GBP