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Oval|Natural|GIA

1.51ct M SI1 Oval Natural Diamond

EX • M/SI1 • GIA 6461158881

Certificate GIA 6461158881

Diamond specifications and retailer prices

From £1,603 GBP
As of November 5, 2026
Save £564 GBP (26%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,317 GBP at NZ Jewellers · As of September 30, 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 M 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 6461158881. Listed at 8 retailers as of November 2, 2026, with a 35% 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
M
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.24°
Pavilion angle37.85°
OriginNatural
Grading LabGIA
CertificateGIA 6461158881
Dimensions8.48 × 6.32 × 4.01 mm
L/W Ratio1.34
Top View
8.48 mm6.32 mm1.51 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6461158881
Side View
Table 61.0%Crown 46.24°Girdle: VTN-VTKPavilion 37.85°Culet: NoneDepth 63.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,937 GBP|Low: £1,084 GBP|High: £2,167 GBP|Avg: £1,620 GBP|+2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 5, 2026
Retailer 5£1,084 GBP
Retailer 4£1,350 GBP
Retailer 3£1,603 GBP
Retailer 1£1,937 GBP
Retailer 2£2,167 GBP

21 data points across 5 retailers

8 retailers£1,603 GBP to £2,167 GBP

Retailer 1
-
£1,587 GBP
Price last confirmed 29 days ago
Retailer 2
-
£1,587 GBP
View
Price last confirmed 29 days ago
A
Retailer 3
-
£1,603 GBP
View
Retailer 4
-
£1,660 GBP
View
Price last confirmed 38 days ago
Retailer 5
-
£1,831 GBP
View
Price last confirmed 38 days ago
B+
Retailer 6
-
£1,937 GBP
View
B+
Retailer 7
-
£2,167 GBP
View
Most Expensive
NZ Jewellers
4491c710-f0bd-4255-a46b-d772af54f870 · Sep 30
£3,317 GBP
$4,440 USD
View
Price last confirmed 37 days ago
7 more retailers have this diamond
Prices start from £1,603 GBPSave up to £564 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
£1,603 GBP