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Oval|Natural|GIA

1.51ct K SI1 Oval Natural Diamond

GD • K/SI1 • GIA 1513557476

Certificate GIA 1513557476

Diamond specifications and retailer prices

From £3,237 GBP
As of November 5, 2026
Save £3,694 GBP (53%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £6,931 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 1513557476. Listed at 16 retailers as of November 5, 2026, with prices from £3,237 to £6,931, a £3,694 spread on the same certified stone. NZ Jewellers lists it at £6,931. 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
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1513557476
Dimensions9.31 × 6.62 × 3.81 mm
L/W Ratio1.41
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Needle, Indented Natural
Top View
9.31 mm6.62 mm1.51 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1513557476
Side View
Table 59.0%CrownGirdle: ThickPavilionCulet: NoneDepth 57.5%

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 5
Current: £6,931 GBP|Low: £3,205 GBP|High: £6,931 GBP|Avg: £4,442 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
November 6, 2026
Retailer 10£3,205 GBP
Retailer 12£3,275 GBP
Retailer 11£3,494 GBP
Retailer 3£3,754 GBP
Retailer 5£3,754 GBP
Retailer 13£3,754 GBP
Retailer 7£4,003 GBP
Retailer 2£4,023 GBP
Retailer 4£4,332 GBP
Retailer 6£4,412 GBP
Retailer 8£5,056 GBP
Retailer 9£6,583 GBP
NZ Jewellers£6,931 GBP

45 data points across 13 retailers

16 retailers£3,237 GBP to £6,931 GBP

Retailer 1
-
£3,205 GBP
Price last confirmed 16 days ago
B+
Retailer 2
-
£3,237 GBP
View
B+
Retailer 3
-
£3,275 GBP
View
B+
Retailer 4
-
£3,494 GBP
View
B
Retailer 5
-
£3,530 GBP
View
Retailer 6
-
£3,754 GBP
View
Price last confirmed 8 days ago
B
Retailer 7
-
£3,754 GBP
View
B
Retailer 8
-
£3,754 GBP
View
B
Retailer 9
-
£3,955 GBP
View
B
Retailer 10
-
£4,003 GBP
View
B
Retailer 11
-
£4,023 GBP
View
B
Retailer 12
-
£4,332 GBP
View
B
Retailer 13
-
£4,412 GBP
View
B
Retailer 14
-
£5,056 GBP
View
C
Retailer 15
-
£6,583 GBP
View
Most Expensive
C
NZ Jewellers
8bc41d33-7895-43aa-8bd4-97a357c6a8eb · Nov 5
£6,931 GBP
$9,277 USD
View
15 more retailers have this diamond
Prices start from £3,237 GBPSave up to £3,694 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+
1.51ct Oval
£3,237 GBP