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Marquise|Natural|GIA

1.21ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 2558612489

Certificate GIA 2558612489

Diamond specifications and retailer prices

From £1,765 GBP
As of November 5, 2026
Save £1,276 GBP (42%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,041 GBP at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2558612489. Listed at 11 retailers as of November 5, 2026, with prices from £1,765 to £3,041, a £1,276 spread on the same certified stone. Wholesale Diamonds Direct lists it at £3,041. 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
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.03°
Pavilion angle42.12°
OriginNatural
Grading LabGIA
CertificateGIA 2558612489
Dimensions10.01 × 5.49 × 3.69 mm
L/W Ratio1.82
Culet sizeNone
Top View
10.01 mm5.49 mm1.21 ctI / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2558612489
Side View
Table 61.0%Crown 42.03°Girdle: THN-VTKPavilion 42.12°Culet: NoneDepth 67.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,838 GBP|Low: £1,756 GBP|High: £3,353 GBP|Avg: £2,328 GBP|-7.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Wholesale Diamonds Direct
November 6, 2026
Retailer 5£1,765 GBP
Retailer 1£1,838 GBP
Retailer 6£1,869 GBP
Retailer 4£1,987 GBP
Retailer 9£2,034 GBP
Retailer 2£2,180 GBP
Retailer 7£2,196 GBP
Retailer 8£2,285 GBP
Retailer 3£2,396 GBP
Wholesale Diamonds Direct£3,041 GBP

42 data points across 10 retailers

11 retailers£1,765 GBP to £3,041 GBP

A
Cheapest Retailer
-
£1,765 GBP
A
Retailer 2
-
£1,838 GBP
View
A
Retailer 3
-
£1,869 GBP
View
B+
Retailer 4
-
£1,987 GBP
View
B+
Retailer 5
-
£2,034 GBP
View
B+
Retailer 6
-
£2,180 GBP
View
B+
Retailer 7
-
£2,196 GBP
View
B+
Retailer 8
-
£2,285 GBP
View
B+
Retailer 9
-
£2,396 GBP
View
B+
Retailer 10
-
£2,468 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
584564609 · Nov 6
£3,041 GBP
$4,070 USD
View
10 more retailers have this diamond
Prices start from £1,765 GBPSave up to £1,276 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.

A
1.21ct Marquise
£1,765 GBP