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Marquise|Natural|GIA

1.51ct G SI2 Marquise Natural Diamond

EX • G/SI2 • GIA 1186263478

Certificate GIA 1186263478

Diamond specifications and retailer prices

From £6,451 GBP
$8,657 USD
As of November 1, 2026
Save £5,174 GBP (45%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £11,625 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1186263478. Listed at 14 retailers as of October 30, 2026, with prices from £6,451 to £11,625, a £5,174 spread on the same certified stone. NZ Jewellers lists it at £11,625. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1186263478
Dimensions10.65 × 6.09 × 3.81 mm
L/W Ratio1.75
Culet sizeSmall
Top View
10.65 mm6.09 mm1.51 ctG / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1186263478
Side View
Table 58.0%CrownGirdle: THN-VTKPavilionCulet: SmallDepth 62.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £11,625 GBP|Low: £6,451 GBP|High: £11,625 GBP|Avg: £8,532 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
November 2, 2026
Retailer 4£6,451 GBP
Retailer 8£6,975 GBP
Retailer 3£7,033 GBP
Retailer 9£7,556 GBP
Retailer 5£7,570 GBP
Retailer 7£7,672 GBP
Retailer 2£8,374 GBP
Retailer 10£8,719 GBP
Retailer 11£9,179 GBP
Retailer 12£10,018 GBP
Retailer 6£10,893 GBP
NZ Jewellers£11,625 GBP

42 data points across 12 retailers

14 retailers£6,451 GBP to £11,625 GBP

B+
Cheapest Retailer
-
£6,451 GBP
$8,657 USD
B+
Retailer 2
-
£6,530 GBP
$8,763 USD
View
B+
Retailer 3
-
£6,763 GBP
CA$12,606 CAD
View
B+
Retailer 4
-
£6,975 GBP
$9,360 USD
View
B+
Retailer 5
-
£7,033 GBP
$9,438 USD
View
B+
Retailer 6
-
£7,556 GBP
$10,140 USD
View
B+
Retailer 7
-
£7,570 GBP
View
B+
Retailer 8
-
£7,672 GBP
$10,296 USD
View
B
Retailer 9
-
£8,041 GBP
$10,790 USD
View
B
Retailer 10
-
£8,374 GBP
€10,702 EUR
View
B
Retailer 11
-
£8,719 GBP
$11,700 USD
View
Retailer 12
-
£9,179 GBP
$12,318 USD
View
Price last confirmed 10 days ago
B
Retailer 13
-
£10,893 GBP
View
Most Expensive
B
NZ Jewellers
820b5d22-e9e2-4532-819b-2b1403d0e7c4 · Oct 30
£11,625 GBP
$15,600 USD
View
13 more retailers have this diamond
Prices start from £6,451 GBPSave up to £5,174 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+
1.51ct Marquise
£6,451 GBP