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Marquise|Natural|GIA

1.51ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 5546282913

Certificate GIA 5546282913

Diamond specifications and retailer prices

From £3,589 GBP
As of November 6, 2026
Save £3,090 GBP (46%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £6,679 GBP at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise 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 5546282913. Listed at 8 retailers as of November 3, 2026, with prices from £3,589 to £6,679, a £3,090 spread on the same certified stone. NZ Jewellers lists it at £6,679. 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
SymmetryVery Good
FluorescenceNone
Crown angle43.51°
Pavilion angle39.18°
OriginNatural
Grading LabGIA
CertificateGIA 5546282913
Dimensions13.01 × 5.36 × 3.51 mm
L/W Ratio2.43
Top View
13.01 mm5.36 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5546282913
Side View
Table 64.0%Crown 43.51°GirdlePavilion 39.18°CuletDepth 65.5%

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: £6,679 GBP|Low: £3,589 GBP|High: £6,960 GBP|Avg: £4,647 GBP|-4.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 5£3,589 GBP
Retailer 4£3,743 GBP
Retailer 6£3,892 GBP
Retailer 2£3,895 GBP
Retailer 7£3,993 GBP
Retailer 8£3,993 GBP
Retailer 9£4,675 GBP
Retailer 10£4,829 GBP
Retailer 3£6,361 GBP
NZ Jewellers£6,679 GBP

30 data points across 10 retailers

8 retailers£3,589 GBP to £6,679 GBP

A
Cheapest Retailer
-
£3,589 GBP
B+
Retailer 2
-
£3,743 GBP
View
B+
Retailer 3
-
£3,892 GBP
View
B+
Retailer 4
-
£3,895 GBP
View
B+
Retailer 5
-
£3,993 GBP
View
B+
Retailer 6
-
£3,993 GBP
View
B
Retailer 7
-
£6,361 GBP
View
Most Expensive
B
NZ Jewellers
74969bda-97c9-4678-ad62-e5392926a5e0 · Nov 3
£6,679 GBP
$8,940 USD
View
7 more retailers have this diamond
Prices start from £3,589 GBPSave up to £3,090 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 Marquise
£3,589 GBP