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Oval|Natural|GIA

1.51ct K SI1 Oval Natural Diamond

GD • K/SI1 • GIA 6375880480

Certificate GIA 6375880480

Diamond specifications and retailer prices

From £3,338 GBP
As of November 6, 2026
Save £3,260 GBP (49%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £6,598 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 6375880480. Listed at 17 retailers as of November 5, 2026, with prices from £3,338 to £6,598, a £3,260 spread on the same certified stone. NZ Jewellers lists it at £6,598. 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
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6375880480
Dimensions8.88 × 6.63 × 4.05 mm
L/W Ratio1.34
Top View
8.88 mm6.63 mm1.51 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6375880480
Side View
Table 60.0%CrownGirdle: THN-STKPavilionCulet: NoneDepth 61.1%

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: £3,735 GBP|Low: £3,482 GBP|High: £6,205 GBP|Avg: £4,308 GBP|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6£3,482 GBP
Retailer 2£3,501 GBP
Retailer 1£3,735 GBP
Retailer 7£3,945 GBP
Retailer 5£4,462 GBP
Retailer 3£4,813 GBP
Retailer 4£6,115 GBP

40 data points across 7 retailers

17 retailers£3,338 GBP to £6,598 GBP

B+
Cheapest Retailer
-
£3,338 GBP
B+
Retailer 2
-
£3,431 GBP
View
B+
Retailer 3
-
£3,440 GBP
View
Retailer 4
-
£3,482 GBP
View
Price last confirmed 16 days ago
B+
Retailer 5
-
£3,501 GBP
View
B
Retailer 6
-
£3,586 GBP
View
B
Retailer 7
-
£3,702 GBP
View
B
Retailer 8
-
£3,735 GBP
View
Retailer 9
-
£3,945 GBP
View
Price last confirmed 8 days ago
B
Retailer 10
-
£3,945 GBP
View
B
Retailer 11
-
£3,945 GBP
View
B
Retailer 12
-
£4,058 GBP
View
B
Retailer 13
-
£4,462 GBP
View
B
Retailer 14
-
£4,551 GBP
View
B
Retailer 15
-
£4,813 GBP
View
C
Retailer 16
-
£6,115 GBP
View
Most Expensive
C
NZ Jewellers
2ac61b3e-3814-4d03-9bf2-8ef5f5c05a53 · Nov 5
£6,598 GBP
$8,831 USD
View
16 more retailers have this diamond
Prices start from £3,338 GBPSave up to £3,260 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
£3,338 GBP