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Marquise|Natural|GIA

1.51ct E SI1 Marquise Natural Diamond

VG • E/SI1 • GIA 6552657128

Certificate GIA 6552657128

Diamond specifications and retailer prices

From £5,861 GBP
SGD 10,613 SGD
As of October 30, 2026
Save £4,643 GBP (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £10,505 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 E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6552657128. Listed at 13 retailers as of October 30, 2026, with prices from £5,861 to £10,505, a £4,643 spread on the same certified stone. With Clarity lists it at £10,505. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
E
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.86°
Pavilion angle39.05°
OriginNatural
Grading LabGIA
CertificateGIA 6552657128
Dimensions10.95 × 5.90 × 3.67 mm
L/W Ratio1.86
Culet sizeNone
Top View
10.95 mm5.90 mm1.51 ctE / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552657128
Side View
Table 62.0%Crown 39.86°Girdle: THN-THKPavilion 39.05°Culet: NoneDepth 62.2%

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 30
Current: £6,656 GBP|Low: £5,861 GBP|High: £11,160 GBP|Avg: £7,422 GBP|-6.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
With Clarity
October 29, 2026
Retailer 5£5,861 GBP
Retailer 8£6,203 GBP
Retailer 7£6,344 GBP
Retailer 9£6,345 GBP
Retailer 10£6,450 GBP
Retailer 6£6,538 GBP
Retailer 1£6,656 GBP
Retailer 3£7,522 GBP
Retailer 11£7,594 GBP
Retailer 4£7,763 GBP
Retailer 2£7,767 GBP
With Clarity£10,505 GBP

39 data points across 12 retailers

13 retailers£5,861 GBP to £10,505 GBP

A
Cheapest Retailer
-
£5,861 GBP
SGD 10,613 SGD
A
Retailer 2
-
£6,203 GBP
$8,312 USD
View
A
Retailer 3
-
£6,344 GBP
$8,500 USD
View
A
Retailer 4
-
£6,345 GBP
SGD 11,488 SGD
View
A
Retailer 5
-
£6,450 GBP
$8,642 USD
View
A
Retailer 6
-
£6,538 GBP
$8,760 USD
View
A
Retailer 7
-
£6,656 GBP
View
B+
Retailer 8
-
£7,522 GBP
$10,079 USD
View
B+
Retailer 9
-
£7,594 GBP
$10,175 USD
View
B+
Retailer 10
-
£7,763 GBP
€9,906 EUR
View
B+
Retailer 11
-
£7,767 GBP
$10,407 USD
View
B+
Retailer 12
-
£8,197 GBP
$10,983 USD
View
Most Expensive
B
With Clarity
6552657128 · Oct 30
£10,505 GBP
$14,075 USD
View
12 more retailers have this diamond
Prices start from £5,861 GBPSave up to £4,643 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
£5,861 GBP