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Oval|Natural|GIA

1.51ct K SI1 Oval Natural Diamond

EX • K/SI1 • GIA 7538124930

Certificate GIA 7538124930

Diamond specifications and retailer prices

From £1,706 GBP
As of November 5, 2026
Save £2,239 GBP (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,569 GBP at NZ Jewellers · As of October 17, 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7538124930. Listed at 15 retailers as of November 2, 2026, with a 131% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 7538124930
Dimensions8.88 × 6.46 × 4.06 mm
L/W Ratio1.37
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
8.88 mm6.46 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 7538124930
Side View
Table 64.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 62.7%

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 5
Current: £4,569 GBP|Low: £1,664 GBP|High: £4,569 GBP|Avg: £2,528 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
November 6, 2026
Retailer 9£1,706 GBP
Retailer 12£1,817 GBP
Retailer 2£1,923 GBP
Retailer 4£2,185 GBP
Retailer 6£2,185 GBP
Retailer 3£2,270 GBP
Retailer 13£2,290 GBP
Retailer 7£2,426 GBP
Retailer 5£2,521 GBP
Retailer 14£2,524 GBP
Retailer 10£2,760 GBP
Retailer 8£2,879 GBP
Retailer 11£3,945 GBP
NZ Jewellers£4,569 GBP

32 data points across 14 retailers

15 retailers£1,706 GBP to £3,945 GBP

A
Cheapest Retailer
-
£1,706 GBP
A
Retailer 2
-
£1,817 GBP
View
A
Retailer 3
-
£1,923 GBP
View
A
Retailer 4
-
£2,095 GBP
View
Retailer 5
-
£2,185 GBP
View
Price last confirmed 19 days ago
Retailer 6
-
£2,185 GBP
View
Price last confirmed 21 days ago
Retailer 7
-
£2,270 GBP
View
Price last confirmed 21 days ago
B+
Retailer 8
-
£2,290 GBP
View
B+
Retailer 9
-
£2,426 GBP
View
Retailer 10
-
£2,521 GBP
View
Price last confirmed 19 days ago
B+
Retailer 11
-
£2,524 GBP
View
B+
Retailer 12
-
£2,760 GBP
View
B+
Retailer 13
-
£2,879 GBP
View
B
Retailer 14
-
£3,945 GBP
View
Most Expensive
NZ Jewellers
19334150-a7b4-4654-a5a9-02760a4528ad · Oct 17
£4,569 GBP
$6,115 USD
View
Price last confirmed 20 days ago
14 more retailers have this diamond
Prices start from £1,706 GBPSave up to £2,239 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
£1,706 GBP