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Marquise|Natural|GIA

1.51ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 6555854230

Certificate GIA 6555854230

Diamond specifications and retailer prices

From £5,101 GBP
$6,845 USD
As of November 1, 2026
Save £6,052 GBP (54%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £11,153 GBP at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 6555854230. Listed at 18 retailers as of November 1, 2026, with prices from £5,101 to £11,153, a £6,052 spread on the same certified stone. NZ Jewellers lists it at £11,153. 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
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555854230
Dimensions10.71 × 5.96 × 3.96 mm
L/W Ratio1.80
Culet sizeNone
Top View
10.71 mm5.96 mm1.51 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555854230
Side View
Table 55.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 66.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £11,153 GBP|Low: £4,937 GBP|High: £11,153 GBP|Avg: £6,726 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 3, 2026
Retailer 14£5,101 GBP
Retailer 3£5,221 GBP
Retailer 9£5,286 GBP
Retailer 7£5,563 GBP
Retailer 4£5,576 GBP
Retailer 17£5,576 GBP
Retailer 10£5,940 GBP
Retailer 19£6,041 GBP
Retailer 5£6,134 GBP
Retailer 2£6,217 GBP
Retailer 12£6,327 GBP
Retailer 8£6,335 GBP
Retailer 6£6,584 GBP
Retailer 18£6,970 GBP
Retailer 13£7,284 GBP
Retailer 11£7,342 GBP
Retailer 16£8,192 GBP
Retailer 15£9,293 GBP
NZ Jewellers£11,153 GBP

17 data points across 19 retailers

18 retailers£5,101 GBP to £11,153 GBP

B+
Cheapest Retailer
-
£5,101 GBP
$6,845 USD
B+
Retailer 2
-
£5,221 GBP
$7,006 USD
View
B+
Retailer 3
-
£5,286 GBP
$7,093 USD
View
B+
Retailer 4
-
£5,563 GBP
$7,465 USD
View
B+
Retailer 5
-
£5,576 GBP
$7,482 USD
View
Final sale: no returns
B+
Retailer 6
-
£5,576 GBP
$7,483 USD
View
B
Retailer 7
-
£5,940 GBP
$7,972 USD
View
B
Retailer 8
-
£6,041 GBP
$8,106 USD
View
B
Retailer 9
-
£6,134 GBP
$8,231 USD
View
B
Retailer 10
-
£6,217 GBP
View
B
Retailer 11
-
£6,327 GBP
View
Retailer 12
-
£6,335 GBP
A$13,078 AUD
View
Price last confirmed 34 days ago
B
Retailer 13
-
£6,584 GBP
$8,836 USD
View
B
Retailer 14
-
£6,970 GBP
$9,353 USD
View
B
Retailer 15
-
£7,284 GBP
€9,309 EUR
View
B
Retailer 16
-
£8,192 GBP
ZAR 177,588 ZAR
View
B
Retailer 17
-
£9,293 GBP
View
Most Expensive
C
NZ Jewellers
3e8021c5-b628-48f2-a70b-ff429de73b5f · Nov 3
£11,153 GBP
$14,966 USD
View
17 more retailers have this diamond
Prices start from £5,101 GBPSave up to £6,052 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.

B+
1.51ct Marquise
£5,101 GBP