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Oval|Natural|GIA

1.50ct M SI1 Oval Natural Diamond

ID • M/SI1 • GIA 6511873729

Certificate GIA 6511873729

Diamond specifications and retailer prices

From £1,424 GBP
As of November 6, 2026
Save £1,967 GBP (58%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,391 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.5ct natural oval diamond

This 1.5ct 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 6511873729. Listed at 11 retailers as of November 5, 2026, with prices from £1,424 to £3,391, a £1,967 spread on the same certified stone. NZ Jewellers lists it at £3,391. 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

1.50
Carat
M
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6511873729
Dimensions9.57 × 6.08 × 4.04 mm
L/W Ratio1.57
Top View
9.57 mm6.08 mm1.50 ctM / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6511873729
Side View
Table 56.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 66.4%

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 6
Current: £3,391 GBP|Low: £1,424 GBP|High: £3,487 GBP|Avg: £1,898 GBP|-2.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 2£1,424 GBP
Retailer 11£1,527 GBP
Retailer 4£1,570 GBP
Retailer 3£1,622 GBP
Retailer 9£1,622 GBP
Retailer 10£1,636 GBP
Retailer 8£1,697 GBP
Retailer 6£1,819 GBP
Retailer 7£1,980 GBP
Retailer 5£2,140 GBP
NZ Jewellers£3,391 GBP

43 data points across 11 retailers

11 retailers£1,424 GBP to £3,391 GBP

A
Cheapest Retailer
-
£1,424 GBP
A
Retailer 2
-
£1,527 GBP
View
A
Retailer 3
-
£1,570 GBP
View
B+
Retailer 4
-
£1,622 GBP
View
Retailer 5
-
£1,622 GBP
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£1,636 GBP
View
B+
Retailer 7
-
£1,697 GBP
View
B+
Retailer 8
-
£1,819 GBP
View
B+
Retailer 9
-
£1,980 GBP
View
B+
Retailer 10
-
£2,140 GBP
View
Most Expensive
B
NZ Jewellers
1a9c3cda-e926-45ff-bfd1-33e5176d1031 · Nov 5
£3,391 GBP
$4,539 USD
View
10 more retailers have this diamond
Prices start from £1,424 GBPSave up to £1,967 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
1.50ct Oval
£1,424 GBP