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Marquise|Natural|GIA

1.50ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 6455423519

Certificate GIA 6455423519

Diamond specifications and retailer prices

From £8,056 GBP
$10,811 USD
As of November 1, 2026
Save £6,274 GBP (44%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £14,331 GBP at NZ Jewellers · As of November 3, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6455423519. Listed at 9 retailers as of November 1, 2026, with prices from £8,056 to £14,331, a £6,274 spread on the same certified stone. NZ Jewellers lists it at £14,331. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.50
Carat
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6455423519
Dimensions11.42 × 6.01 × 3.62 mm
L/W Ratio1.90
Top View
11.42 mm6.01 mm1.50 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6455423519
Side View
TableCrownGirdle: STK-VTKPavilionCulet: NoneDepth

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £14,331 GBP|Low: £6,638 GBP|High: £14,331 GBP|Avg: £9,609 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 2, 2026
Retailer 15£6,638 GBP
Retailer 14£8,056 GBP
Retailer 13£8,243 GBP
Retailer 3£8,549 GBP
Retailer 8£8,598 GBP
Retailer 12£8,598 GBP
Retailer 10£9,315 GBP
Retailer 9£9,458 GBP
Retailer 4£10,327 GBP
Retailer 5£10,343 GBP
Retailer 7£10,343 GBP
Retailer 2£10,464 GBP
Retailer 6£10,686 GBP
Retailer 11£10,748 GBP
NZ Jewellers£14,331 GBP

18 data points across 15 retailers

9 retailers£8,056 GBP to £14,331 GBP

B
Cheapest Retailer
-
£8,056 GBP
$10,811 USD
B
Retailer 2
-
£8,243 GBP
CA$15,364 CAD
View
C
Retailer 3
-
£8,598 GBP
$11,538 USD
View
Final sale: no returns
C
Retailer 4
-
£9,315 GBP
$12,500 USD
View
C
Retailer 5
-
£9,458 GBP
$12,692 USD
View
C
Retailer 6
-
£10,464 GBP
€13,374 EUR
View
Retailer 7
-
£10,748 GBP
$14,423 USD
View
Price last confirmed 57 days ago
C
Retailer 8
-
£10,748 GBP
$14,423 USD
View
Most Expensive
C
NZ Jewellers
044d2ac6-c33f-45ad-80ba-b023f12f0ed2 · Nov 3
£14,331 GBP
$19,231 USD
View
8 more retailers have this diamond
Prices start from £8,056 GBPSave up to £6,274 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
£8,056 GBP