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Marquise|Natural|GIA

1.51ct D SI2 Marquise Natural Diamond

EX • D/SI2 • GIA 6551911901

Certificate GIA 6551911901

Diamond specifications and retailer prices

From £5,278 GBP
As of November 6, 2026
Save £1,336 GBP (20%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £6,613 GBP at GemTrove · As of November 6, 2026
View at GemTrove

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 6551911901. Listed at 5 retailers as of November 6, 2026, with prices from £5,278 to £6,613, a £1,336 spread on the same certified stone. GemTrove lists it at £6,613. 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
OriginNatural
Grading LabGIA
CertificateGIA 6551911901
Dimensions10.95 × 5.84 × 3.86 mm
L/W Ratio1.88
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Natural
Top View
10.95 mm5.84 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551911901
Side View
Table 63.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 66.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £5,278 GBP|Low: £5,278 GBP|High: £6,146 GBP|Avg: £5,674 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 1£5,278 GBP
Retailer 3£5,548 GBP
Retailer 4£5,764 GBP
Retailer 2£5,791 GBP

46 data points across 4 retailers

5 retailers£5,278 GBP to £6,613 GBP

A
Cheapest Retailer
-
£5,278 GBP
A
Retailer 2
-
£5,548 GBP
View
A
Retailer 3
-
£5,764 GBP
View
A
Retailer 4
-
£5,791 GBP
View
Most Expensive
A
GemTrove
GT-N-01274111-98 · Nov 6
£6,613 GBP
A$13,618 AUD
View
4 more retailers have this diamond
Prices start from £5,278 GBPSave up to £1,336 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
£5,278 GBP