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Marquise|Natural|GIA

1.51ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 5241109438

Certificate GIA 5241109438

Diamond specifications and retailer prices

From £2,456 GBP
As of November 4, 2026
Save £1,996 GBP (45%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £4,453 GBP at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5241109438. Listed at 9 retailers as of November 4, 2026, with prices from £2,456 to £4,453, a £1,996 spread on the same certified stone. Wholesale Diamonds Direct lists it at £4,453. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle40.07°
Pavilion angle40.14°
OriginNatural
Grading LabGIA
CertificateGIA 5241109438
Dimensions11.11 × 5.88 × 3.77 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.11 mm5.88 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5241109438
Side View
Table 59.0%Crown 40.07°Girdle: STK-THKPavilion 40.14°Culet: NDepth 64.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £3,267 GBP|Low: £2,456 GBP|High: £4,453 GBP|Avg: £3,121 GBP|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Wholesale Diamonds Direct
November 6, 2026
Retailer 5£2,456 GBP
Retailer 4£2,625 GBP
Retailer 7£2,681 GBP
Retailer 8£2,986 GBP
Retailer 2£3,130 GBP
Retailer 6£3,170 GBP
Retailer 1£3,267 GBP
Retailer 3£4,143 GBP
Wholesale Diamonds Direct£4,453 GBP

6 data points across 9 retailers

9 retailers£2,456 GBP to £4,453 GBP

A
Cheapest Retailer
-
£2,456 GBP
A
Retailer 2
-
£2,625 GBP
View
A
Retailer 3
-
£2,681 GBP
View
B+
Retailer 4
-
£2,986 GBP
View
B+
Retailer 5
-
£3,130 GBP
View
B+
Retailer 6
-
£3,170 GBP
View
B+
Retailer 7
-
£3,267 GBP
View
B+
Retailer 8
-
£4,143 GBP
View
Most Expensive
B+
Wholesale Diamonds Direct
668871297 · Nov 6
£4,453 GBP
$5,960 USD
View
8 more retailers have this diamond
Prices start from £2,456 GBPSave up to £1,996 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
£2,456 GBP