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Marquise|Natural|GIA

1.51ct K SI2 Marquise Natural Diamond

VG • K/SI2 • GIA 2556257527

Certificate GIA 2556257527

Diamond specifications and retailer prices

From £2,990 GBP
As of November 5, 2026
Save £3,523 GBP (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £6,964 GBP at NZ Jewellers · As of September 25, 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2556257527. Listed at 14 retailers as of November 4, 2026, with a 118% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
K
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556257527
Dimensions10.91 × 5.89 × 3.88 mm
L/W Ratio1.85
Girdle conditionFaceted
Top View
10.91 mm5.89 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556257527
Side View
Table 57.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 65.9%

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 5
Current: £6,061 GBP|Low: £2,990 GBP|High: £6,711 GBP|Avg: £4,048 GBP|-3.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 3£2,990 GBP
Retailer 7£3,003 GBP
Retailer 12£3,245 GBP
Retailer 4£3,321 GBP
Retailer 10£3,372 GBP
Retailer 2£3,428 GBP
Retailer 6£3,586 GBP
Retailer 13£3,656 GBP
Retailer 8£3,869 GBP
Retailer 5£3,947 GBP
Retailer 11£4,560 GBP
Retailer 1£6,061 GBP
Retailer 9£6,513 GBP

27 data points across 13 retailers

14 retailers£2,990 GBP to £6,513 GBP

A
Cheapest Retailer
-
£2,990 GBP
A
Retailer 2
-
£3,003 GBP
View
A
Retailer 3
-
£3,245 GBP
View
B+
Retailer 4
-
£3,321 GBP
View
A
Retailer 5
-
£3,372 GBP
View
B+
Retailer 6
-
£3,428 GBP
View
Final sale: no returns
B+
Retailer 7
-
£3,586 GBP
View
B+
Retailer 8
-
£3,656 GBP
View
B+
Retailer 9
-
£3,869 GBP
View
B+
Retailer 10
-
£3,947 GBP
View
B+
Retailer 11
-
£4,560 GBP
View
B
Retailer 12
-
£6,061 GBP
View
B
Retailer 13
-
£6,513 GBP
View
Most Expensive
NZ Jewellers
8d27364e-0cc6-4b8a-ac56-fb8dae0ef48c · Sep 25
£6,964 GBP
$9,321 USD
View
Price last confirmed 42 days ago
13 more retailers have this diamond
Prices start from £2,990 GBPSave up to £3,523 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
£2,990 GBP