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Marquise|Natural|GIA

1.50ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 5543246564

Certificate GIA 5543246564

Diamond specifications and retailer prices

From £6,591 GBP
$8,831 USD
As of November 1, 2026
Save £5,141 GBP (44%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £11,732 GBP at NZ Jewellers · As of October 30, 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 I 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 5543246564. Listed at 16 retailers as of October 30, 2026, with prices from £6,591 to £11,732, a £5,141 spread on the same certified stone. NZ Jewellers lists it at £11,732. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5543246564
Dimensions12.38 × 5.80 × 3.59 mm
L/W Ratio2.13
Top View
12.38 mm5.80 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5543246564
Side View
Table 61.0%CrownGirdle: Ext. ThickPavilionCulet: NDepth 61.9%

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 1
Current: £11,732 GBP|Low: £7,039 GBP|High: £11,732 GBP|Avg: £8,880 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 8£7,039 GBP
Retailer 10£7,626 GBP
Retailer 5£7,705 GBP
Retailer 9£7,743 GBP
Retailer 3£7,744 GBP
Retailer 4£7,988 GBP
Retailer 11£8,799 GBP
Retailer 7£8,869 GBP
Retailer 6£10,342 GBP
Retailer 2£10,994 GBP
NZ Jewellers£11,732 GBP

30 data points across 11 retailers

16 retailers£6,591 GBP to £11,732 GBP

B+
Cheapest Retailer
-
£6,591 GBP
$8,831 USD
B+
Retailer 2
-
£6,596 GBP
$8,838 USD
View
B
Retailer 3
-
£7,039 GBP
$9,432 USD
View
B
Retailer 4
-
£7,098 GBP
$9,511 USD
View
B
Retailer 5
-
£7,507 GBP
$10,058 USD
View
B+
Retailer 6
-
£7,626 GBP
$10,218 USD
View
B+
Retailer 7
-
£7,705 GBP
View
B
Retailer 8
-
£7,743 GBP
$10,375 USD
View
Retailer 9
-
£7,744 GBP
A$15,962 AUD
View
Price last confirmed 9 days ago
B
Retailer 10
-
£7,988 GBP
View
B
Retailer 11
-
£8,799 GBP
$11,790 USD
View
B
Retailer 12
-
£8,869 GBP
€11,318 EUR
View
Retailer 13
-
£9,263 GBP
$12,412 USD
View
Price last confirmed 10 days ago
B
Retailer 14
-
£10,342 GBP
ZAR 223,860 ZAR
View
B
Retailer 15
-
£10,994 GBP
View
Most Expensive
B
NZ Jewellers
d80cf3e7-7dbd-4a31-8e40-ad03c8d18939 · Oct 30
£11,732 GBP
$15,720 USD
View
15 more retailers have this diamond
Prices start from £6,591 GBPSave up to £5,141 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
£6,591 GBP