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Marquise|Natural|GIA

1.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 7566682513

Certificate GIA 7566682513

Diamond specifications and retailer prices

From £4,829 GBP
SGD 8,757 SGD
As of November 1, 2026
Save £2,964 GBP (38%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £7,793 GBP at Helzberg Diamonds · As of November 1, 2026
View at Helzberg Diamonds

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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7566682513. Listed at 14 retailers as of November 1, 2026, with prices from £4,829 to £7,793, a £2,964 spread on the same certified stone. Helzberg Diamonds lists it at £7,793. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.21°
Pavilion angle38.5°
OriginNatural
Grading LabGIA
CertificateGIA 7566682513
Dimensions11.51 × 6.08 × 3.55 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.51 mm6.08 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7566682513
Side View
Table 61.0%Crown 34.21°Girdle: MED-THKPavilion 38.5°Culet: NDepth 58.3%

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: £7,793 GBP|Low: £4,829 GBP|High: £7,793 GBP|Avg: £5,842 GBP
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 11£4,829 GBP
Retailer 5£5,009 GBP
Retailer 10£5,041 GBP
Retailer 8£5,110 GBP
Retailer 9£5,180 GBP
Retailer 6£5,328 GBP
Retailer 3£5,388 GBP
Retailer 4£6,029 GBP
Retailer 12£6,074 GBP
Retailer 13£6,111 GBP
Retailer 2£6,151 GBP
Retailer 7£6,845 GBP
Helzberg Diamonds£7,793 GBP

12 data points across 13 retailers

14 retailers£4,829 GBP to £7,793 GBP

A
Cheapest Retailer
-
£4,829 GBP
SGD 8,757 SGD
B+
Retailer 2
-
£5,009 GBP
$6,722 USD
View
B+
Retailer 3
-
£5,027 GBP
SGD 9,116 SGD
View
B+
Retailer 4
-
£5,041 GBP
$6,765 USD
View
B+
Retailer 5
-
£5,110 GBP
$6,857 USD
View
B+
Retailer 6
-
£5,180 GBP
$6,951 USD
View
B+
Retailer 7
-
£5,328 GBP
View
B+
Retailer 8
-
£5,388 GBP
$7,230 USD
View
B+
Retailer 9
-
£6,029 GBP
$8,090 USD
View
B+
Retailer 10
-
£6,074 GBP
$8,151 USD
View
B+
Retailer 11
-
£6,111 GBP
$8,201 USD
View
B+
Retailer 12
-
£6,151 GBP
€7,861 EUR
View
B
Retailer 13
-
£6,845 GBP
$9,186 USD
View
Most Expensive
B
Helzberg Diamonds
XZRNLMMMOILHJ · Nov 1
£7,793 GBP
$10,458 USD
View
13 more retailers have this diamond
Prices start from £4,829 GBPSave up to £2,964 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
£4,829 GBP