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Marquise|Natural|GIA

1.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 7561213708

Certificate GIA 7561213708

Diamond specifications and retailer prices

From £4,525 GBP
SGD 8,206 SGD
As of October 31, 2026
Save £4,139 GBP (48%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £8,664 GBP at With Clarity · As of October 30, 2026
View at With Clarity

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 7561213708. Listed at 13 retailers as of October 30, 2026, with prices from £4,525 to £8,664, a £4,139 spread on the same certified stone. With Clarity lists it at £8,664. 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
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.73°
Pavilion angle39.89°
OriginNatural
Grading LabGIA
CertificateGIA 7561213708
Dimensions12.20 × 5.81 × 3.55 mm
L/W Ratio2.10
Culet sizeNone
Top View
12.20 mm5.81 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7561213708
Side View
Table 60.0%Crown 37.73°Girdle: THN-THKPavilion 39.89°Culet: NoneDepth 61.0%

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: Oct 31
Current: £7,127 GBP|Low: £4,525 GBP|High: £9,159 GBP|Avg: £6,226 GBP|-8.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
With Clarity
October 30, 2026
Retailer 11£4,525 GBP
Retailer 10£5,027 GBP
Retailer 4£5,131 GBP
Retailer 9£5,242 GBP
Retailer 7£5,320 GBP
Retailer 8£5,393 GBP
Retailer 5£5,591 GBP
Retailer 2£6,263 GBP
Retailer 12£6,313 GBP
Retailer 3£6,383 GBP
Retailer 6£6,404 GBP
Retailer 1£7,127 GBP
With Clarity£8,664 GBP

27 data points across 13 retailers

13 retailers£4,525 GBP to £8,664 GBP

A
Cheapest Retailer
-
£4,525 GBP
SGD 8,206 SGD
B+
Retailer 2
-
£5,027 GBP
SGD 9,116 SGD
View
A
Retailer 3
-
£5,131 GBP
$6,885 USD
View
A
Retailer 4
-
£5,242 GBP
$7,035 USD
View
B+
Retailer 5
-
£5,320 GBP
$7,139 USD
View
B+
Retailer 6
-
£5,393 GBP
$7,237 USD
View
B+
Retailer 7
-
£5,591 GBP
View
B+
Retailer 8
-
£6,263 GBP
$8,404 USD
View
B+
Retailer 9
-
£6,313 GBP
$8,472 USD
View
B+
Retailer 10
-
£6,383 GBP
$8,566 USD
View
B+
Retailer 11
-
£6,404 GBP
€8,185 EUR
View
B+
Retailer 12
-
£7,127 GBP
$9,564 USD
View
Most Expensive
B
With Clarity
7561213708 · Oct 30
£8,664 GBP
$11,627 USD
View
12 more retailers have this diamond
Prices start from £4,525 GBPSave up to £4,139 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
£4,525 GBP