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Marquise|Natural|GIA

1.21ct F I1 Marquise Natural Diamond

F/I1 • GIA 1429175870

Certificate GIA 1429175870

Diamond specifications and retailer prices

From £2,157 GBP
HK$22,600 HKD
As of November 1, 2026
Save £2,667 GBP (55%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £4,824 GBP at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded F colour (colourless) and I1 clarity (included) and certified by GIA 1429175870. Listed at 10 retailers as of November 1, 2026, with prices from £2,157 to £4,824, a £2,667 spread on the same certified stone. NZ Jewellers lists it at £4,824. 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

1.21
Carat
F
Colour
I1
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1429175870
Dimensions9.82 × 5.81 × 3.33 mm
L/W Ratio1.69
Culet sizeNone
Key to symbols
Crystal, Feather, Twinning Wisp, Indented Natural
Top View
9.82 mm5.81 mm1.21 ctF / I1
OriginNatural
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1429175870
Side View
Table 58.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 57.3%

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 1
Current: £4,824 GBP|Low: £2,138 GBP|High: £4,824 GBP|Avg: £2,739 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 3, 2026
Retailer 9£2,157 GBP
Retailer 5£2,192 GBP
Retailer 11£2,243 GBP
Retailer 13£2,319 GBP
Retailer 6£2,508 GBP
Retailer 10£2,612 GBP
Retailer 7£2,841 GBP
Retailer 8£2,895 GBP
Retailer 3£2,960 GBP
Retailer 4£3,057 GBP
Retailer 2£3,228 GBP
Retailer 12£3,431 GBP
NZ Jewellers£4,824 GBP

20 data points across 13 retailers

10 retailers£2,157 GBP to £4,824 GBP

B+
Cheapest Retailer
-
£2,157 GBP
HK$22,600 HKD
B+
Retailer 2
-
£2,243 GBP
$3,008 USD
View
B+
Retailer 3
-
£2,508 GBP
$3,364 USD
View
B+
Retailer 4
-
£2,612 GBP
$3,503 USD
View
B
Retailer 5
-
£2,841 GBP
$3,810 USD
View
B
Retailer 6
-
£2,895 GBP
$3,882 USD
View
B
Retailer 7
-
£2,960 GBP
$3,970 USD
View
B
Retailer 8
-
£3,057 GBP
$4,100 USD
View
B
Retailer 9
-
£3,228 GBP
€4,123 EUR
View
Most Expensive
C
NZ Jewellers
460b2d06-e372-4bee-ad2f-3484af32fb5b · Nov 3
£4,824 GBP
$6,470 USD
View
9 more retailers have this diamond
Prices start from £2,157 GBPSave up to £2,667 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+
1.21ct Marquise
£2,157 GBP