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Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 6552321194

Certificate GIA 6552321194

Diamond specifications and retailer prices

From £1,711 GBP
As of November 5, 2026
Save £1,700 GBP (50%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,411 GBP at Wholesale Diamonds Direct · As of November 4, 2026
View at Wholesale Diamonds Direct

About this 1.2ct natural marquise diamond

This 1.2ct 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 6552321194. Listed at 11 retailers as of November 4, 2026, with prices from £1,711 to £3,411, a £1,700 spread on the same certified stone. Wholesale Diamonds Direct lists it at £3,411. 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

1.20
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle39.29°
Pavilion angle38.47°
OriginNatural
Grading LabGIA
CertificateGIA 6552321194
Dimensions10.46 × 5.53 × 3.40 mm
L/W Ratio1.89
Culet sizeNone
Top View
10.46 mm5.53 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6552321194
Side View
Table 59.0%Crown 39.29°Girdle: THN-THKPavilion 38.47°Culet: NoneDepth 61.5%

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: £1,711 GBP|Low: £1,701 GBP|High: £3,909 GBP|Avg: £2,622 GBP|-8.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Wholesale Diamonds Direct
November 5, 2026
Retailer 1£1,711 GBP
Retailer 2£2,095 GBP
Retailer 9£2,101 GBP
Retailer 7£2,280 GBP
Retailer 5£2,446 GBP
Retailer 8£2,476 GBP
Retailer 6£2,520 GBP
Retailer 4£2,526 GBP
Retailer 3£3,193 GBP
Wholesale Diamonds Direct£3,411 GBP

33 data points across 10 retailers

11 retailers£1,711 GBP to £3,411 GBP

A
Cheapest Retailer
-
£1,711 GBP
A
Retailer 2
-
£2,095 GBP
View
A
Retailer 3
-
£2,101 GBP
View
A
Retailer 4
-
£2,280 GBP
View
B+
Retailer 5
-
£2,446 GBP
View
B+
Retailer 6
-
£2,476 GBP
View
B+
Retailer 7
-
£2,520 GBP
View
B+
Retailer 8
-
£2,526 GBP
View
B+
Retailer 9
-
£2,852 GBP
View
B+
Retailer 10
-
£3,193 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
643534585 · Nov 4
£3,411 GBP
$4,565 USD
View
10 more retailers have this diamond
Prices start from £1,711 GBPSave up to £1,700 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
1.20ct Marquise
£1,711 GBP