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Marquise|Natural|GIA

1.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 5566372644

Certificate GIA 5566372644

Diamond specifications and retailer prices

From £4,826 GBP
HK$50,600 HKD
As of November 1, 2026
Save £5,910 GBP (55%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £10,737 GBP at NZ Jewellers · As of November 3, 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 I 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 5566372644. Listed at 11 retailers as of November 1, 2026, with prices from £4,826 to £10,737, a £5,910 spread on the same certified stone. NZ Jewellers lists it at £10,737. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 5566372644
Dimensions11.71 × 5.87 × 3.69 mm
L/W Ratio1.99
Girdle conditionMedium to Very Thick
Key to symbols
Crystal, Feather, Needle
Top View
11.71 mm5.87 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceStrong
CertificateGIA 5566372644
Side View
Table 60.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 62.8%

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: £10,737 GBP|Low: £4,788 GBP|High: £11,506 GBP|Avg: £6,944 GBP|-6.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 3, 2026
Retailer 8£4,826 GBP
Retailer 4£4,909 GBP
Retailer 10£5,187 GBP
Retailer 9£5,675 GBP
Retailer 5£6,091 GBP
Retailer 2£6,415 GBP
Retailer 7£6,420 GBP
Retailer 3£6,518 GBP
Retailer 6£8,946 GBP
NZ Jewellers£10,737 GBP

36 data points across 10 retailers

11 retailers£4,826 GBP to £10,737 GBP

A
Cheapest Retailer
-
£4,826 GBP
HK$50,600 HKD
A
Retailer 2
-
£4,909 GBP
₹627,397 INR
View
B+
Retailer 3
-
£5,187 GBP
$6,960 USD
View
Final sale: no returns
B+
Retailer 4
-
£5,675 GBP
$7,616 USD
View
Retailer 5
-
£5,685 GBP
SGD 10,310 SGD
View
Price last confirmed 22 days ago
B+
Retailer 6
-
£6,091 GBP
View
B+
Retailer 7
-
£6,415 GBP
View
B
Retailer 8
-
£6,420 GBP
$8,615 USD
View
B
Retailer 9
-
£6,518 GBP
$8,747 USD
View
B
Retailer 10
-
£8,946 GBP
View
Most Expensive
B
NZ Jewellers
c46d6811-9a3a-4d37-b07f-f337090d5828 · Nov 3
£10,737 GBP
$14,408 USD
View
10 more retailers have this diamond
Prices start from £4,826 GBPSave up to £5,910 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
£4,826 GBP