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Marquise|Natural|GIA

1.50ct G SI2 Marquise Natural Diamond

EX • G/SI2 • GIA 6421787418

Certificate GIA 6421787418

Diamond specifications and retailer prices

From £5,520 GBP
As of November 6, 2026
Save £5,027 GBP (48%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £10,547 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.5ct natural marquise diamond

This 1.5ct natural marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6421787418. Listed at 14 retailers as of November 5, 2026, with prices from £5,520 to £10,547, a £5,027 spread on the same certified stone. NZ Jewellers lists it at £10,547. 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
G
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6421787418
Dimensions10.83 × 6.18 × 3.79 mm
L/W Ratio1.75
Top View
10.83 mm6.18 mm1.50 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6421787418
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCulet: Very SmallDepth 61.2%

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: £10,547 GBP|Low: £5,520 GBP|High: £10,547 GBP|Avg: £7,743 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 4£5,520 GBP
Retailer 14£5,925 GBP
Retailer 3£6,328 GBP
Retailer 13£6,328 GBP
Retailer 9£6,381 GBP
Retailer 6£6,745 GBP
Retailer 8£6,834 GBP
Retailer 12£6,855 GBP
Retailer 11£6,961 GBP
Retailer 15£7,910 GBP
Retailer 2£7,928 GBP
Retailer 5£8,331 GBP
Retailer 7£9,208 GBP
Retailer 10£9,856 GBP
NZ Jewellers£10,547 GBP

37 data points across 15 retailers

14 retailers£5,520 GBP to £10,547 GBP

A
Cheapest Retailer
-
£5,520 GBP
A
Retailer 2
-
£5,925 GBP
View
B+
Retailer 3
-
£6,328 GBP
View
Final sale: no returns
B+
Retailer 4
-
£6,381 GBP
View
B+
Retailer 5
-
£6,745 GBP
View
B+
Retailer 6
-
£6,834 GBP
View
B+
Retailer 7
-
£6,855 GBP
View
B+
Retailer 8
-
£6,961 GBP
View
B
Retailer 9
-
£7,910 GBP
View
Retailer 10
-
£7,910 GBP
View
Price last confirmed 46 days ago
B+
Retailer 11
-
£7,928 GBP
View
Retailer 12
-
£8,331 GBP
View
Price last confirmed 32 days ago
B
Retailer 13
-
£9,856 GBP
View
Most Expensive
B
NZ Jewellers
2c005af1-3789-47d6-b397-86e7dec1092e · Nov 5
£10,547 GBP
$14,117 USD
View
13 more retailers have this diamond
Prices start from £5,520 GBPSave up to £5,027 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 Marquise
£5,520 GBP