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Marquise|Natural|GIA

1.51ct J SI1 Marquise Natural Diamond

ID • J/SI1 • GIA 6552045873

Certificate GIA 6552045873

Diamond specifications and retailer prices

From £4,525 GBP
$6,072 USD
As of November 2, 2026
Save £4,064 GBP (47%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £8,588 GBP at NZ Jewellers · As of October 30, 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 6552045873. Listed at 9 retailers as of October 30, 2026, with prices from £4,525 to £8,588, a £4,064 spread on the same certified stone. NZ Jewellers lists it at £8,588. 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
FluorescenceFaint
Crown angle42.9°
Pavilion angle39.32°
OriginNatural
Grading LabGIA
CertificateGIA 6552045873
Dimensions10.50 × 5.90 × 3.98 mm
L/W Ratio1.78
Girdle conditionVery Thick
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
10.50 mm5.90 mm1.51 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6552045873
Side View
Table 56.0%Crown 42.9°Girdle: ThickPavilion 39.32°Culet: NoneDepth 67.5%

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 2
Current: £8,588 GBP|Low: £4,046 GBP|High: £8,588 GBP|Avg: £5,135 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9£4,046 GBP
Retailer 11£4,496 GBP
Retailer 8£4,525 GBP
Retailer 7£4,758 GBP
Retailer 5£4,941 GBP
Retailer 10£5,060 GBP
Retailer 6£5,135 GBP
Retailer 4£5,214 GBP
Retailer 3£5,395 GBP
Retailer 2£7,565 GBP
NZ Jewellers£8,588 GBP

10 data points across 11 retailers

9 retailers£4,525 GBP to £8,588 GBP

Retailer 1
-
£4,046 GBP
$5,430 USD
Price last confirmed 12 days ago
B+
Retailer 2
-
£4,525 GBP
$6,072 USD
View
B+
Retailer 3
-
£4,758 GBP
$6,385 USD
View
B+
Retailer 4
-
£4,941 GBP
View
Retailer 5
-
£5,060 GBP
$6,790 USD
View
Price last confirmed 11 days ago
B
Retailer 6
-
£5,135 GBP
$6,891 USD
View
B
Retailer 7
-
£5,214 GBP
$6,997 USD
View
B
Retailer 8
-
£7,565 GBP
View
Most Expensive
B
NZ Jewellers
fa36bc89-12e4-4b27-8be9-f83b8580a03e · Oct 30
£8,588 GBP
$11,525 USD
View
8 more retailers have this diamond
Prices start from £4,525 GBPSave up to £4,064 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
£4,525 GBP