CaratHunter
Plans
Marquise|Natural|GIA

1.50ct I SI2 Marquise Natural Diamond

ID • I/SI2 • GIA 1555664423

Certificate GIA 1555664423

Diamond specifications and retailer prices

From £4,642 GBP
$6,220 USD
As of November 1, 2026
Save £4,005 GBP (46%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £8,647 GBP at MOH London · As of November 1, 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 I 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 1555664423. Listed at 14 retailers as of November 1, 2026, with prices from £4,642 to £8,647, a £4,005 spread on the same certified stone. MOH London lists it at £8,647. 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
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555664423
Dimensions11.46 × 5.97 × 3.63 mm
L/W Ratio1.92
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Natural
Top View
11.46 mm5.97 mm1.50 ctI / SI2
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555664423
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NDepth 60.8%

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 1
Current: £8,647 GBP|Low: £5,092 GBP|High: £8,751 GBP|Avg: £6,128 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 7£5,092 GBP
Retailer 12£5,172 GBP
Retailer 10£5,379 GBP
Retailer 6£5,793 GBP
Retailer 8£5,865 GBP
Retailer 5£5,865 GBP
Retailer 11£6,000 GBP
Retailer 4£6,262 GBP
Retailer 9£6,326 GBP
Retailer 3£6,471 GBP
Retailer 2£6,479 GBP
MOH London£8,647 GBP

41 data points across 12 retailers

14 retailers£4,642 GBP to £8,647 GBP

A
Cheapest Retailer
-
£4,642 GBP
$6,220 USD
B+
Retailer 2
-
£5,092 GBP
$6,823 USD
View
B+
Retailer 3
-
£5,172 GBP
CA$9,625 CAD
View
B+
Retailer 4
-
£5,379 GBP
$7,207 USD
View
B+
Retailer 5
-
£5,793 GBP
$7,762 USD
View
B+
Retailer 6
-
£5,865 GBP
$7,858 USD
View
B+
Retailer 7
-
£5,865 GBP
View
B+
Retailer 8
-
£6,000 GBP
$8,039 USD
View
B
Retailer 9
-
£6,262 GBP
$8,390 USD
View
B
Retailer 10
-
£6,262 GBP
$8,390 USD
View
B
Retailer 11
-
£6,326 GBP
$8,477 USD
View
B
Retailer 12
-
£6,471 GBP
$8,670 USD
View
B
Retailer 13
-
£6,479 GBP
€8,268 EUR
View
Most Expensive
B
MOH London
D2AC85338 · Nov 1
£8,647 GBP
View
13 more retailers have this diamond
Prices start from £4,642 GBPSave up to £4,005 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
£4,642 GBP