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Marquise|Natural|GIA

1.51ct J SI1 Marquise Natural Diamond

ID • J/SI1 • GIA 6545855164

Certificate GIA 6545855164

Diamond specifications and retailer prices

From £4,337 GBP
$5,820 USD
As of November 3, 2026
Save £3,461 GBP (44%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £7,798 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545855164. Listed at 8 retailers as of November 3, 2026, with prices from £4,337 to £7,798, a £3,461 spread on the same certified stone. NZ Jewellers lists it at £7,798. 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
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
Crown angle41.63°
Pavilion angle40.51°
OriginNatural
Grading LabGIA
CertificateGIA 6545855164
Dimensions10.29 × 5.82 × 4.01 mm
L/W Ratio1.77
Girdle conditionExtremely Thick
Key to symbols
Twinning Wisp, Feather, Crystal, Cavity, Needle, Indented Natural
Top View
10.29 mm5.82 mm1.51 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6545855164
Side View
Table 58.0%Crown 41.63°Girdle: Very ThickPavilion 40.51°Culet: NoneDepth 68.9%

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 3
Current: £7,798 GBP|Low: £3,707 GBP|High: £7,798 GBP|Avg: £4,786 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 3, 2026
Retailer 7£3,707 GBP
Retailer 9£4,108 GBP
Retailer 6£4,337 GBP
Retailer 3£4,486 GBP
Retailer 8£4,623 GBP
Retailer 2£4,663 GBP
Retailer 5£4,663 GBP
Retailer 10£4,821 GBP
Retailer 4£6,869 GBP
NZ Jewellers£7,798 GBP

9 data points across 10 retailers

8 retailers£4,337 GBP to £7,798 GBP

Retailer 1
-
£3,707 GBP
$4,975 USD
Price last confirmed 12 days ago
B+
Retailer 2
-
£4,337 GBP
$5,820 USD
View
B+
Retailer 3
-
£4,486 GBP
View
Retailer 4
-
£4,623 GBP
$6,204 USD
View
Price last confirmed 11 days ago
B+
Retailer 5
-
£4,663 GBP
$6,257 USD
View
B+
Retailer 6
-
£4,663 GBP
$6,257 USD
View
B
Retailer 7
-
£6,869 GBP
View
Most Expensive
B
NZ Jewellers
585d15c7-17d9-4888-9413-d2b0a26f5a75 · Nov 3
£7,798 GBP
$10,465 USD
View
7 more retailers have this diamond
Prices start from £4,337 GBPSave up to £3,461 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 Marquise
£4,337 GBP