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Marquise|Natural|GIA

1.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 5566477733

Certificate GIA 5566477733

Diamond specifications and retailer prices

From £5,030 GBP
SGD 9,121 SGD
As of November 1, 2026
Save £2,100 GBP (29%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £7,130 GBP at Diamonds Direct · As of November 1, 2026
View at Diamonds Direct

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 5566477733. Listed at 12 retailers as of November 1, 2026, with prices from £5,030 to £7,130, a £2,100 spread on the same certified stone. Diamonds Direct lists it at £7,130. 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
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle39.9°
Pavilion angle38.11°
OriginNatural
Grading LabGIA
CertificateGIA 5566477733
Dimensions11.22 × 5.93 × 3.64 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.22 mm5.93 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 5566477733
Side View
Table 59.0%Crown 39.9°Girdle: MED-THKPavilion 38.11°Culet: NoneDepth 61.5%

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: £7,130 GBP|Low: £5,030 GBP|High: £7,130 GBP|Avg: £5,831 GBP
Diamonds Direct
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 3, 2026
Retailer 4£5,030 GBP
Retailer 7£5,223 GBP
Retailer 9£5,236 GBP
Retailer 8£5,246 GBP
Retailer 12£5,323 GBP
Retailer 11£5,396 GBP
Retailer 2£5,595 GBP
Retailer 3£6,266 GBP
Retailer 10£6,316 GBP
Retailer 6£6,359 GBP
Retailer 5£6,410 GBP
Diamonds Direct£7,130 GBP

31 data points across 12 retailers

12 retailers£5,030 GBP to £7,130 GBP

A
Cheapest Retailer
-
£5,030 GBP
SGD 9,121 SGD
A
Retailer 2
-
£5,223 GBP
$7,009 USD
View
A
Retailer 3
-
£5,236 GBP
SGD 9,496 SGD
View
B+
Retailer 4
-
£5,246 GBP
$7,040 USD
View
B+
Retailer 5
-
£5,323 GBP
$7,143 USD
View
B+
Retailer 6
-
£5,396 GBP
$7,241 USD
View
B+
Retailer 7
-
£5,595 GBP
View
B+
Retailer 8
-
£6,266 GBP
$8,409 USD
View
B+
Retailer 9
-
£6,316 GBP
$8,476 USD
View
Retailer 10
-
£6,359 GBP
$8,533 USD
View
Price last confirmed 7 days ago
B+
Retailer 11
-
£6,410 GBP
€8,192 EUR
View
Most Expensive
B
Diamonds Direct
1129909 · Nov 1
£7,130 GBP
$9,568 USD
View
11 more retailers have this diamond
Prices start from £5,030 GBPSave up to £2,100 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
£5,030 GBP