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Marquise|Natural|GIA

1.22ct I SI1 Marquise Natural Diamond

ID • I/SI1 • GIA 2554567350

Certificate GIA 2554567350

Diamond specifications and retailer prices

From £3,407 GBP
$4,560 USD
As of November 5, 2026
2 retailers carry this diamond
Most expensive: £3,407 GBP at Brilliant Earth
View at Brilliant Earth

About this 1.22ct natural marquise diamond

This 1.22ct natural marquise sits in the classic one-carat band, graded I 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 2554567350. Listed at 2 retailers as of November 5, 2026. 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

1.22
Carat
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2554567350
Dimensions10.59 × 5.63 × 3.52 mm
L/W Ratio1.88
Top View
10.59 mm5.63 mm1.22 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2554567350
Side View
Table 66.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 62.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: £3,407 GBP|Low: £2,772 GBP|High: £3,833 GBP|Avg: £3,308 GBP|-11.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
October 31, 2026
Retailer 2£2,772 GBP
Retailer 4£3,046 GBP
Brilliant Earth£3,407 GBP
Retailer 3£3,417 GBP

9 data points across 4 retailers

2 retailers

Retailer 1
-
£2,772 GBP
Price last confirmed 17 days ago
Most Expensive
B
Brilliant Earth
20366724A · Nov 5
£3,407 GBP
$4,560 USD
View
1 more retailer has this diamond

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
1.22ct Marquise
£3,407 GBP