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Marquise|Natural|GIA

1.51ct D SI2 Marquise Natural Diamond

EX • D/SI2 • GIA 2556189473

Certificate GIA 2556189473

Diamond specifications and retailer prices

From £4,755 GBP
SGD 8,610 SGD
As of November 1, 2026
Save £1,578 GBP (25%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £6,333 GBP at The Diamond Guys · As of November 2, 2026
View at The Diamond Guys

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556189473. Listed at 9 retailers as of November 1, 2026, with prices from £4,755 to £6,333, a £1,578 spread on the same certified stone. The Diamond Guys lists it at £6,333. 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

1.51
Carat
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.8°
Pavilion angle38.25°
OriginNatural
Grading LabGIA
CertificateGIA 2556189473
Dimensions11.31 × 5.98 × 3.69 mm
L/W Ratio1.89
Top View
11.31 mm5.98 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556189473
Side View
Table 59.0%Crown 39.8°Girdle: STK-THKPavilion 38.25°Culet: NoneDepth 61.8%

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: £5,247 GBP|Low: £4,755 GBP|High: £6,612 GBP|Avg: £5,558 GBP|-8.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 4£4,755 GBP
Retailer 3£4,888 GBP
Retailer 5£4,950 GBP
Retailer 8£5,101 GBP
Retailer 1£5,247 GBP
Retailer 2£5,314 GBP
Retailer 7£5,943 GBP
Retailer 6£6,086 GBP
Retailer 9£6,291 GBP

43 data points across 9 retailers

9 retailers£4,755 GBP to £6,333 GBP

A
Cheapest Retailer
-
£4,755 GBP
SGD 8,610 SGD
A
Retailer 2
-
£4,888 GBP
$6,549 USD
View
A
Retailer 3
-
£4,950 GBP
SGD 8,963 SGD
View
A
Retailer 4
-
£5,101 GBP
$6,835 USD
View
A
Retailer 5
-
£5,247 GBP
View
A
Retailer 6
-
£5,314 GBP
$7,120 USD
View
A
Retailer 7
-
£5,943 GBP
$7,963 USD
View
A
Retailer 8
-
£6,086 GBP
$8,155 USD
View
Most Expensive
A
The Diamond Guys
1955282050 · Nov 2
£6,333 GBP
$8,486 USD
View
8 more retailers have this diamond
Prices start from £4,755 GBPSave up to £1,578 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
1.51ct Marquise
£4,755 GBP