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Marquise|Natural|GIA

1.51ct H SI1 Marquise Natural Diamond

GD • H/SI1 • GIA 7556154054

Certificate GIA 7556154054

Diamond specifications and retailer prices

From £5,765 GBP
As of November 6, 2026
Save £5,291 GBP (48%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £11,056 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 H 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 7556154054. Listed at 8 retailers as of November 3, 2026, with prices from £5,765 to £11,056, a £5,291 spread on the same certified stone. NZ Jewellers lists it at £11,056. 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
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle35.97°
Pavilion angle36.24°
OriginNatural
Grading LabGIA
CertificateGIA 7556154054
Dimensions11.07 × 6.23 × 3.46 mm
L/W Ratio1.78
Girdle conditionExtremely Thick
Key to symbols
Twinning Wisp, Feather, Cavity, Knot, Indented Natural
Top View
11.07 mm6.23 mm1.51 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7556154054
Side View
Table 67.0%Crown 35.97°GirdlePavilion 36.24°CuletDepth 55.6%

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 6
Current: £11,056 GBP|Low: £5,765 GBP|High: £11,056 GBP|Avg: £7,093 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 6£5,765 GBP
Retailer 9£5,992 GBP
Retailer 7£6,070 GBP
Retailer 2£6,228 GBP
Retailer 5£6,610 GBP
Retailer 8£6,633 GBP
Retailer 4£6,712 GBP
Retailer 10£7,165 GBP
Retailer 3£9,212 GBP
NZ Jewellers£11,056 GBP

10 data points across 10 retailers

8 retailers£5,765 GBP to £11,056 GBP

B+
Cheapest Retailer
-
£5,765 GBP
B
Retailer 2
-
£6,070 GBP
View
B
Retailer 3
-
£6,228 GBP
View
B
Retailer 4
-
£6,610 GBP
View
B
Retailer 5
-
£6,633 GBP
View
B
Retailer 6
-
£6,712 GBP
View
C
Retailer 7
-
£9,212 GBP
View
Most Expensive
C
NZ Jewellers
83094239-06f5-4d17-a5c7-0f7a72abd881 · Nov 3
£11,056 GBP
$14,798 USD
View
7 more retailers have this diamond
Prices start from £5,765 GBPSave up to £5,291 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
£5,765 GBP