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Marquise|Natural|GIA

1.20ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 6542456377

Certificate GIA 6542456377

Diamond specifications and retailer prices

From £2,092 GBP
As of November 5, 2026
Save £2,727 GBP (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,819 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 6542456377. Listed at 20 retailers as of November 5, 2026, with prices from £2,092 to £4,819, a £2,727 spread on the same certified stone. NZ Jewellers lists it at £4,819. 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
SymmetryVery Good
FluorescenceFaint
Crown angle38.23°
Pavilion angle39.12°
OriginNatural
Grading LabGIA
CertificateGIA 6542456377
Dimensions10.40 × 5.53 × 3.46 mm
L/W Ratio1.88
Girdle conditionVery Thick
Key to symbols
Feather, Crystal, Needle
Top View
10.40 mm5.53 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6542456377
Side View
Table 60.0%Crown 38.23°Girdle: THK-VTKPavilion 39.12°Culet: NoneDepth 62.7%

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 5
Current: £4,819 GBP|Low: £2,092 GBP|High: £4,819 GBP|Avg: £3,034 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 8£2,092 GBP
Retailer 6£2,225 GBP
Retailer 12£2,266 GBP
Retailer 13£2,506 GBP
Retailer 14£2,506 GBP
Retailer 4£2,603 GBP
Retailer 2£2,684 GBP
Retailer 5£2,842 GBP
Retailer 7£2,846 GBP
Retailer 3£2,892 GBP
Retailer 11£3,225 GBP
Retailer 9£3,376 GBP
Retailer 10£4,614 GBP
NZ Jewellers£4,819 GBP

36 data points across 14 retailers

20 retailers£2,092 GBP to £4,819 GBP

B+
Cheapest Retailer
-
£2,092 GBP
B+
Retailer 2
-
£2,225 GBP
View
B+
Retailer 3
-
£2,266 GBP
View
B
Retailer 4
-
£2,335 GBP
View
B
Retailer 5
-
£2,418 GBP
View
B
Retailer 6
-
£2,506 GBP
View
Retailer 7
-
£2,506 GBP
View
Price last confirmed 8 days ago
B
Retailer 8
-
£2,515 GBP
View
B
Retailer 9
-
£2,586 GBP
View
B
Retailer 10
-
£2,603 GBP
View
B
Retailer 11
-
£2,684 GBP
View
B
Retailer 12
-
£2,842 GBP
View
Retailer 13
-
£2,842 GBP
View
Price last confirmed 28 days ago
B
Retailer 14
-
£2,846 GBP
View
B
Retailer 15
-
£2,892 GBP
View
Retailer 16
-
£3,132 GBP
View
Price last confirmed 22 days ago
B
Retailer 17
-
£3,225 GBP
View
B
Retailer 18
-
£3,376 GBP
View
B
Retailer 19
-
£4,614 GBP
View
Most Expensive
C
NZ Jewellers
11a171f1-1057-4f87-b4c5-efd38b187b1f · Nov 5
£4,819 GBP
$6,486 USD
View
19 more retailers have this diamond
Prices start from £2,092 GBPSave up to £2,727 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+
1.20ct Marquise
£2,092 GBP