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Marquise|Natural|GIA

1.21ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 7546578209

Certificate GIA 7546578209

Diamond specifications and retailer prices

From £3,896 GBP
As of November 6, 2026
Save £1,535 GBP (28%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £5,431 GBP at Jared · As of November 6, 2026
View at Jared

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7546578209. Listed at 9 retailers as of November 6, 2026, with prices from £3,896 to £5,431, a £1,535 spread on the same certified stone. Jared lists it at £5,431. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.08°
Pavilion angle40.63°
OriginNatural
Grading LabGIA
CertificateGIA 7546578209
Dimensions10.62 × 5.60 × 3.48 mm
L/W Ratio1.90
Culet sizeNone
Top View
10.62 mm5.60 mm1.21 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7546578209
Side View
Table 60.0%Crown 36.08°Girdle: MED-THKPavilion 40.63°Culet: NoneDepth 62.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £5,431 GBP|Low: £3,779 GBP|High: £5,467 GBP|Avg: £4,803 GBP
Jared
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 4£3,896 GBP
Retailer 3£4,157 GBP
Retailer 8£4,173 GBP
Retailer 5£4,913 GBP
Retailer 6£5,252 GBP
Retailer 7£5,252 GBP
Retailer 2£5,379 GBP
Jared£5,431 GBP

36 data points across 8 retailers

9 retailers£3,896 GBP to £5,431 GBP

B
Cheapest Retailer
-
£3,896 GBP
B
Retailer 2
-
£4,157 GBP
View
Final sale: no returns
B
Retailer 3
-
£4,173 GBP
View
B
Retailer 4
-
£4,279 GBP
View
B
Retailer 5
-
£4,913 GBP
View
B
Retailer 6
-
£5,252 GBP
View
B
Retailer 7
-
£5,252 GBP
View
B
Retailer 8
-
£5,379 GBP
View
Most Expensive
B
Jared
158334697 · Nov 6
£5,431 GBP
$7,270 USD
View
8 more retailers have this diamond
Prices start from £3,896 GBPSave up to £1,535 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
£3,896 GBP