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Marquise|Natural|GIA

1.50ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 1555018794

Certificate GIA 1555018794

Diamond specifications and retailer prices

From £5,557 GBP
As of November 5, 2026
Save £2,064 GBP (27%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £10,050 GBP at MOH London · As of October 8, 2026
View at MOH London

About this 1.5ct natural marquise diamond

This 1.5ct 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 1555018794. Listed at 14 retailers as of November 5, 2026, with a 37% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.86°
Pavilion angle38.01°
OriginNatural
Grading LabGIA
CertificateGIA 1555018794
Dimensions11.54 × 6.02 × 3.54 mm
L/W Ratio1.92
Girdle conditionVery Thick
Key to symbols
Feather, Twinning Wisp, Cloud
Top View
11.54 mm6.02 mm1.50 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555018794
Side View
Table 60.0%Crown 35.86°Girdle: THK-VTKPavilion 38.01°Culet: NoneDepth 58.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £10,050 GBP|Low: £5,207 GBP|High: £10,050 GBP|Avg: £6,987 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 13£5,594 GBP
Retailer 7£5,728 GBP
Retailer 4£5,869 GBP
Retailer 11£6,024 GBP
Retailer 3£6,366 GBP
Retailer 12£6,627 GBP
Retailer 6£7,013 GBP
Retailer 8£7,237 GBP
Retailer 2£7,378 GBP
Retailer 5£7,621 GBP
Retailer 9£7,866 GBP
Retailer 10£8,516 GBP
MOH London£10,050 GBP

41 data points across 13 retailers

14 retailers£5,557 GBP to £7,621 GBP

B+
Cheapest Retailer
-
£5,557 GBP
B
Retailer 2
-
£5,728 GBP
View
Final sale: no returns
B
Retailer 3
-
£5,751 GBP
View
B
Retailer 4
-
£5,869 GBP
View
Retailer 5
-
£5,975 GBP
View
Price last confirmed 30 days ago
B
Retailer 6
-
£6,627 GBP
View
B
Retailer 7
-
£6,864 GBP
View
B
Retailer 8
-
£7,013 GBP
View
B
Retailer 9
-
£7,237 GBP
View
B
Retailer 10
-
£7,378 GBP
View
Retailer 11
-
£7,468 GBP
View
Price last confirmed 62 days ago
B
Retailer 12
-
£7,621 GBP
View
Retailer 13
-
£7,866 GBP
View
Price last confirmed 30 days ago
Most Expensive
MOH London
452DDEF94 · Oct 8
£10,050 GBP
View
Price last confirmed 29 days ago
13 more retailers have this diamond
Prices start from £5,557 GBPSave up to £2,064 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+
1.50ct Marquise
£5,557 GBP