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Marquise|Natural|GIA

1.51ct M SI1 Marquise Natural Diamond

EX • M/SI1 • GIA 6541762945

Certificate GIA 6541762945

Diamond specifications and retailer prices

From £2,207 GBP
As of November 3, 2026
Save £1,740 GBP (44%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,947 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 M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6541762945. Listed at 6 retailers as of November 3, 2026, with prices from £2,207 to £3,947, a £1,740 spread on the same certified stone. NZ Jewellers lists it at £3,947. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
M
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle39.81°
Pavilion angle39.26°
OriginNatural
Grading LabGIA
CertificateGIA 6541762945
Dimensions10.82 × 5.87 × 3.82 mm
L/W Ratio1.84
Girdle conditionVery Thick
Key to symbols
Crystal, Natural
Top View
10.82 mm5.87 mm1.51 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 6541762945
Side View
Table 58.0%Crown 39.81°GirdlePavilion 39.26°CuletDepth 65.2%

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 3
Current: £3,947 GBP|Low: £2,207 GBP|High: £4,155 GBP|Avg: £2,866 GBP|-5.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 4£2,207 GBP
Retailer 6£2,265 GBP
Retailer 3£2,269 GBP
Retailer 2£2,318 GBP
Retailer 5£2,352 GBP
NZ Jewellers£3,947 GBP
Retailer 7£4,147 GBP

32 data points across 7 retailers

6 retailers£2,207 GBP to £3,947 GBP

B+
Cheapest Retailer
-
£2,207 GBP
B+
Retailer 2
-
£2,265 GBP
View
B+
Retailer 3
-
£2,269 GBP
View
B+
Retailer 4
-
£2,318 GBP
View
B+
Retailer 5
-
£2,352 GBP
View
Most Expensive
C
NZ Jewellers
b4c3c89b-8a51-4fad-ba38-925304eea404 · Nov 3
£3,947 GBP
$5,312 USD
View
5 more retailers have this diamond
Prices start from £2,207 GBPSave up to £1,740 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
£2,207 GBP