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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 7568187004

Certificate GIA 7568187004

Diamond specifications and retailer prices

From £6,496 GBP
As of November 1, 2026
Save £1,236 GBP (16%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £7,733 GBP at Brilliance · As of November 4, 2026
View at Brilliance

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7568187004. Listed at 4 retailers as of November 1, 2026, with prices from £6,496 to £7,733, a £1,236 spread on the same certified stone. Brilliance lists it at £7,733. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7568187004
Dimensions11.55 × 6.02 × 3.82 mm
L/W Ratio1.92
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Natural
Top View
11.55 mm6.02 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7568187004
Side View
Table 57.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 63.4%

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 1
Current: £7,733 GBP|Low: £6,436 GBP|High: £7,748 GBP|Avg: £7,059 GBP|+11.1%
Brilliance
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 3£6,496 GBP
Retailer 4£7,189 GBP
Retailer 2£7,673 GBP
Brilliance£7,733 GBP

21 data points across 4 retailers

4 retailers£6,496 GBP to £7,733 GBP

A
Cheapest Retailer
-
£6,496 GBP
B+
Retailer 2
-
£7,189 GBP
View
B
Retailer 3
-
£7,673 GBP
View
Most Expensive
B
Brilliance
D45831041 · Nov 4
£7,733 GBP
$10,350 USD
View
3 more retailers have this diamond
Prices start from £6,496 GBPSave up to £1,236 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
£6,496 GBP