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Marquise|Natural|GIA

1.20ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 6542707387

Certificate GIA 6542707387

Diamond specifications and retailer prices

From £1,721 GBP
As of November 5, 2026
Save £2,675 GBP (61%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,396 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-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 6542707387. Listed at 14 retailers as of November 5, 2026, with prices from £1,721 to £4,396, a £2,675 spread on the same certified stone. NZ Jewellers lists it at £4,396. 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

1.20
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle37.15°
Pavilion angle39.09°
OriginNatural
Grading LabGIA
CertificateGIA 6542707387
Dimensions10.60 × 5.57 × 3.44 mm
L/W Ratio1.90
Top View
10.60 mm5.57 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6542707387
Side View
Table 58.0%Crown 37.15°Girdle: STK-THKPavilion 39.09°Culet: NoneDepth 61.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £4,396 GBP|Low: £1,721 GBP|High: £4,396 GBP|Avg: £2,369 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
Retailer 14
November 6, 2026
Retailer 6£1,721 GBP
Retailer 14£1,886 GBP
Retailer 3£1,905 GBP
Retailer 4£1,905 GBP
Retailer 12£1,993 GBP
Retailer 2£2,040 GBP
Retailer 9£2,113 GBP
Retailer 5£2,129 GBP
Retailer 13£2,198 GBP
Retailer 8£2,212 GBP
Retailer 7£2,448 GBP
Retailer 10£2,566 GBP
Retailer 11£3,674 GBP
NZ Jewellers£4,396 GBP

29 data points across 14 retailers

14 retailers£1,721 GBP to £4,396 GBP

A
Cheapest Retailer
-
£1,721 GBP
B+
Retailer 2
-
£1,886 GBP
View
Retailer 3
-
£1,905 GBP
View
Price last confirmed 25 days ago
B+
Retailer 4
-
£1,905 GBP
View
B+
Retailer 5
-
£1,993 GBP
View
B+
Retailer 6
-
£2,040 GBP
View
B+
Retailer 7
-
£2,113 GBP
View
B+
Retailer 8
-
£2,129 GBP
View
B+
Retailer 9
-
£2,198 GBP
View
B+
Retailer 10
-
£2,212 GBP
View
B
Retailer 11
-
£2,448 GBP
View
B
Retailer 12
-
£2,566 GBP
View
B
Retailer 13
-
£3,674 GBP
View
Most Expensive
C
NZ Jewellers
fcd1d8e7-efd8-4cc6-a80c-c6ef134f29a9 · Nov 5
£4,396 GBP
$5,884 USD
View
13 more retailers have this diamond
Prices start from £1,721 GBPSave up to £2,675 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
1.20ct Marquise
£1,721 GBP