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Marquise|Natural|GIA

1.51ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 1445475696

Certificate GIA 1445475696

Diamond specifications and retailer prices

From £3,069 GBP
As of November 6, 2026
Save £3,784 GBP (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £6,853 GBP at NZ Jewellers · As of November 5, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1445475696. Listed at 16 retailers as of November 5, 2026, with prices from £3,069 to £6,853, a £3,784 spread on the same certified stone. NZ Jewellers lists it at £6,853. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1445475696
Dimensions12.03 × 6.11 × 3.49 mm
L/W Ratio1.97
Key to symbols
Feather
Top View
12.03 mm6.11 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1445475696
Side View
Table 58.0%CrownGirdle: ThickPavilionCulet: NoneDepth 57.1%

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 6
Current: £6,853 GBP|Low: £3,041 GBP|High: £6,853 GBP|Avg: £4,327 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
November 6, 2026
Retailer 10£3,069 GBP
Retailer 2£3,257 GBP
Retailer 4£3,608 GBP
Retailer 12£3,904 GBP
Retailer 6£3,975 GBP
Retailer 8£3,997 GBP
Retailer 11£4,098 GBP
Retailer 13£4,098 GBP
Retailer 3£4,327 GBP
Retailer 7£4,611 GBP
Retailer 5£4,728 GBP
Retailer 9£6,526 GBP
NZ Jewellers£6,853 GBP

31 data points across 13 retailers

16 retailers£3,069 GBP to £6,853 GBP

A
Cheapest Retailer
-
£3,069 GBP
A
Retailer 2
-
£3,257 GBP
View
B+
Retailer 3
-
£3,608 GBP
View
B+
Retailer 4
-
£3,612 GBP
View
Retailer 5
-
£3,810 GBP
View
Price last confirmed 90 days ago
B+
Retailer 6
-
£3,863 GBP
View
Retailer 7
-
£3,904 GBP
View
Price last confirmed 11 days ago
B+
Retailer 8
-
£3,975 GBP
View
B+
Retailer 9
-
£3,997 GBP
View
B+
Retailer 10
-
£4,098 GBP
View
B+
Retailer 11
-
£4,098 GBP
View
B+
Retailer 12
-
£4,327 GBP
View
B
Retailer 13
-
£4,611 GBP
View
B
Retailer 14
-
£4,728 GBP
View
B
Retailer 15
-
£6,526 GBP
View
Most Expensive
B
NZ Jewellers
65f84ebf-99d5-4b50-bf6a-d5555edcd2fd · Nov 5
£6,853 GBP
$9,173 USD
View
15 more retailers have this diamond
Prices start from £3,069 GBPSave up to £3,784 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
£3,069 GBP