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Oval|Natural|GIA

1.51ct K SI1 Oval Natural Diamond

GD • K/SI1 • GIA 3485065648

Certificate GIA 3485065648

Diamond specifications and retailer prices

From £2,535 GBP
As of November 6, 2026
Save £3,295 GBP (57%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £5,830 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 3485065648. Listed at 22 retailers as of November 5, 2026, with prices from £2,535 to £5,830, a £3,295 spread on the same certified stone. NZ Jewellers lists it at £5,830. 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
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 3485065648
Dimensions8.72 × 6.30 × 4.03 mm
L/W Ratio1.38
Top View
8.72 mm6.30 mm1.51 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 3485065648
Side View
Table 63.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 64.0%

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: £5,830 GBP|Low: £2,574 GBP|High: £5,830 GBP|Avg: £3,694 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
November 6, 2026
Retailer 8£2,574 GBP
Retailer 4£3,032 GBP
Retailer 10£3,032 GBP
Retailer 12£3,032 GBP
Retailer 11£3,209 GBP
Retailer 2£3,246 GBP
Retailer 5£3,390 GBP
Retailer 3£3,498 GBP
Retailer 9£3,786 GBP
Retailer 6£4,082 GBP
Retailer 7£5,315 GBP
NZ Jewellers£5,830 GBP

39 data points across 12 retailers

22 retailers£2,535 GBP to £5,830 GBP

B+
Cheapest Retailer
-
£2,535 GBP
B+
Retailer 2
-
£2,574 GBP
View
B+
Retailer 3
-
£2,668 GBP
View
B+
Retailer 4
-
£2,847 GBP
View
B+
Retailer 5
-
£3,022 GBP
View
Retailer 6
-
£3,032 GBP
View
Price last confirmed 36 days ago
Retailer 7
-
£3,032 GBP
View
Price last confirmed 38 days ago
B+
Retailer 8
-
£3,032 GBP
View
B+
Retailer 9
-
£3,032 GBP
View
Retailer 10
-
£3,032 GBP
View
Price last confirmed 8 days ago
Retailer 11
-
£3,209 GBP
View
Price last confirmed 37 days ago
B+
Retailer 12
-
£3,209 GBP
View
B+
Retailer 13
-
£3,222 GBP
View
B+
Retailer 14
-
£3,246 GBP
View
B+
Retailer 15
-
£3,390 GBP
View
Retailer 16
-
£3,498 GBP
View
Price last confirmed 38 days ago
B
Retailer 17
-
£3,498 GBP
View
B
Retailer 18
-
£3,786 GBP
View
B
Retailer 19
-
£4,082 GBP
View
B
Retailer 20
-
£5,315 GBP
View
Retailer 21
-
£5,830 GBP
View
Price last confirmed 37 days ago
Most Expensive
C
NZ Jewellers
077c617c-fb5f-41d6-9ecd-75ebe8cdcee3 · Nov 5
£5,830 GBP
$7,803 USD
View
21 more retailers have this diamond
Prices start from £2,535 GBPSave up to £3,295 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
£2,535 GBP