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Marquise|Natural|GIA

1.21ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 6551464362

Certificate GIA 6551464362

Diamond specifications and retailer prices

From £4,897 GBP
$6,555 USD
As of November 6, 2026
1 retailer carries this diamond
Only listing: £4,897 GBP at Shane Co
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Shane Co

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 6551464362. Listed at a single retailer as of November 6, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.57°
Pavilion angle41.84°
OriginNatural
Grading LabGIA
CertificateGIA 6551464362
Dimensions10.28 × 5.55 × 3.62 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.28 mm5.55 mm1.21 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551464362
Side View
Table 58.0%Crown 38.57°Girdle: STK-VTKPavilion 41.84°Culet: NoneDepth 65.3%

Caratlytics Score

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C
Average
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Price History

Last verified: Nov 6
Current: £3,778 GBP|Low: £2,553 GBP|High: £6,443 GBP|Avg: £4,508 GBP|-4.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Shane Co
October 2, 2026
Retailer 7£2,553 GBP
Retailer 8£3,518 GBP
Retailer 11£3,703 GBP
Retailer 1£3,778 GBP
Retailer 2£4,215 GBP
Retailer 3£4,296 GBP
Retailer 10£4,370 GBP
Retailer 12£4,539 GBP
Shane Co£4,897 GBP
Retailer 4£5,041 GBP
Retailer 5£5,094 GBP
Retailer 9£5,778 GBP
Retailer 6£6,207 GBP

18 data points across 13 retailers

1 retailer

C
Shane Co
26H0QGG · Nov 6
£4,897 GBP
$6,555 USD
View

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.

C
1.21ct Marquise
£4,897 GBP