Marquise|Natural|GIA

1.51ct I SI1 Marquise Natural Diamond

VG • I/SI1 • GIA 6555154141

Certificate GIA 6555154141

Diamond specifications and retailer prices

From £6,117 GBP
$8,208 USD
As of November 1, 2026
Save £4,773 GBP (44%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £10,889 GBP at NZ Jewellers · As of October 30, 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 6555154141. Listed at 16 retailers as of October 30, 2026, with prices from £6,117 to £10,889, a £4,773 spread on the same certified stone. NZ Jewellers lists it at £10,889. 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
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.42°
Pavilion angle37.74°
OriginNatural
Grading LabGIA
CertificateGIA 6555154141
Dimensions12.68 × 5.80 × 3.40 mm
L/W Ratio2.19
Top View
12.68 mm5.80 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555154141
Side View
Table 60.0%Crown 39.42°Girdle: MED-VTKPavilion 37.74°Culet: NoneDepth 58.6%

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: £7,413 GBP|Low: £7,085 GBP|High: £10,327 GBP|Avg: £8,158 GBP|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 3£7,085 GBP
Retailer 6£7,172 GBP
Retailer 7£7,187 GBP
Retailer 1£7,413 GBP
Retailer 2£8,229 GBP
Retailer 5£9,598 GBP
Retailer 4£10,204 GBP

38 data points across 7 retailers

16 retailers£6,117 GBP to £10,889 GBP

B+
Cheapest Retailer
-
£6,117 GBP
$8,208 USD
B+
Retailer 2
-
£6,487 GBP
$8,705 USD
View
B+
Retailer 3
-
£6,534 GBP
$8,768 USD
View
B+
Retailer 4
-
£6,588 GBP
$8,841 USD
View
B
Retailer 5
-
£6,965 GBP
$9,347 USD
View
B
Retailer 6
-
£7,078 GBP
$9,498 USD
View
B+
Retailer 7
-
£7,085 GBP
View
Retailer 8
-
£7,172 GBP
A$14,807 AUD
View
Price last confirmed 10 days ago
B
Retailer 9
-
£7,187 GBP
$9,644 USD
View
B
Retailer 10
-
£7,413 GBP
View
B
Retailer 11
-
£8,167 GBP
$10,959 USD
View
B
Retailer 12
-
£8,229 GBP
€10,517 EUR
View
Retailer 13
-
£8,599 GBP
$11,540 USD
View
Price last confirmed 10 days ago
B
Retailer 14
-
£9,598 GBP
ZAR 208,082 ZAR
View
B
Retailer 15
-
£10,204 GBP
View
Most Expensive
B
NZ Jewellers
10678399-9b5e-4a92-b356-16fd98a4ee16 · Oct 30
£10,889 GBP
$14,613 USD
View
15 more retailers have this diamond
Prices start from £6,117 GBPSave up to £4,773 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
£6,117 GBP