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Marquise|Natural|GIA

1.50ct D SI1 Marquise Natural Diamond

VG • D/SI1 • GIA 6551666431

Certificate GIA 6551666431

Diamond specifications and retailer prices

From £5,567 GBP
As of November 5, 2026
Save £4,413 GBP (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £9,981 GBP at With Clarity · As of November 6, 2026
View at With Clarity

About this 1.5ct natural marquise diamond

This 1.5ct natural marquise sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6551666431. Listed at 14 retailers as of November 5, 2026, with prices from £5,567 to £9,981, a £4,413 spread on the same certified stone. With Clarity lists it at £9,981. 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
D
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle40.52°
Pavilion angle39.55°
OriginNatural
Grading LabGIA
CertificateGIA 6551666431
Dimensions10.86 × 5.87 × 3.79 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.86 mm5.87 mm1.50 ctD / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551666431
Side View
Table 61.0%Crown 40.52°Girdle: VTN-VTKPavilion 39.55°Culet: NoneDepth 64.7%

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 5
Current: £7,346 GBP|Low: £5,567 GBP|High: £10,393 GBP|Avg: £7,129 GBP|-6.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
With Clarity
November 6, 2026
Retailer 9£5,567 GBP
Retailer 10£5,895 GBP
Retailer 7£5,987 GBP
Retailer 6£6,062 GBP
Retailer 8£6,128 GBP
Retailer 11£6,212 GBP
Retailer 5£6,283 GBP
Retailer 2£7,164 GBP
Retailer 12£7,231 GBP
Retailer 1£7,346 GBP
Retailer 4£7,410 GBP
Retailer 3£9,040 GBP
With Clarity£9,981 GBP

38 data points across 13 retailers

14 retailers£5,567 GBP to £9,981 GBP

A
Cheapest Retailer
-
£5,567 GBP
A
Retailer 2
-
£5,895 GBP
View
A
Retailer 3
-
£5,987 GBP
View
A
Retailer 4
-
£6,062 GBP
View
A
Retailer 5
-
£6,128 GBP
View
A
Retailer 6
-
£6,212 GBP
View
A
Retailer 7
-
£6,283 GBP
View
B+
Retailer 8
-
£7,164 GBP
View
B+
Retailer 9
-
£7,231 GBP
View
B+
Retailer 10
-
£7,346 GBP
View
B+
Retailer 11
-
£7,410 GBP
View
B+
Retailer 12
-
£8,029 GBP
View
B+
Retailer 13
-
£9,040 GBP
View
Most Expensive
B
With Clarity
6551666431 · Nov 6
£9,981 GBP
$13,359 USD
View
13 more retailers have this diamond
Prices start from £5,567 GBPSave up to £4,413 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
£5,567 GBP