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Marquise|Natural|GIA

1.21ct D SI1 Marquise Natural Diamond

EX • D/SI1

Diamond specifications and retailer prices

From £3,765 GBP
As of November 1, 2026
Save £4,574 GBP (55%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £8,339 GBP at NZ Jewellers · As of November 5, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 10 retailers as of November 1, 2026, with prices from £3,765 to £8,339, a £4,574 spread on the same certified stone. NZ Jewellers lists it at £8,339. 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

1.21
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions10.20 × 5.74 × 3.29 mm
L/W Ratio1.78
Top View
10.20 mm5.74 mm1.21 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA
Side View
Table 68.0%CrownGirdle: ThickPavilionCuletDepth 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: £8,339 GBP|Low: £3,765 GBP|High: £9,390 GBP|Avg: £5,205 GBP|-11.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 8£3,765 GBP
Retailer 7£4,276 GBP
Retailer 3£4,517 GBP
Retailer 4£4,517 GBP
Retailer 5£4,517 GBP
Retailer 10£4,546 GBP
Retailer 2£4,838 GBP
Retailer 9£5,051 GBP
Retailer 6£5,213 GBP
NZ Jewellers£8,339 GBP

30 data points across 10 retailers

10 retailers£3,765 GBP to £8,339 GBP

B+
Cheapest Retailer
-
£3,765 GBP
B
Retailer 2
-
£4,276 GBP
View
Retailer 3
-
£4,517 GBP
View
Price last confirmed 9 days ago
B
Retailer 4
-
£4,517 GBP
View
B
Retailer 5
-
£4,517 GBP
View
B
Retailer 6
-
£4,546 GBP
View
B
Retailer 7
-
£4,838 GBP
View
B
Retailer 8
-
£5,051 GBP
View
B
Retailer 9
-
£5,213 GBP
View
Most Expensive
C
NZ Jewellers
e9cb07d0-8cb8-4821-aee2-af32967f0286 · Nov 5
£8,339 GBP
$11,162 USD
View
9 more retailers have this diamond
Prices start from £3,765 GBPSave up to £4,574 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
£3,765 GBP