CaratHunter
Plans
Marquise|Natural|GIA

1.21ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 2557418396

Certificate GIA 2557418396

Diamond specifications and retailer prices

From £3,874 GBP
As of November 6, 2026
2 retailers carry this diamond
Most expensive: £5,226 GBP at 77 Diamonds · As of October 24, 2026
View at 77 Diamonds

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded G 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 2557418396. Listed at 2 retailers as of November 6, 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

1.21
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.34°
Pavilion angle37.33°
OriginNatural
Grading LabGIA
CertificateGIA 2557418396
Dimensions10.76 × 5.68 × 3.28 mm
L/W Ratio1.89
Culet sizeNone
Top View
10.76 mm5.68 mm1.21 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557418396
Side View
Table 60.0%Crown 38.34°Girdle: THN-VTKPavilion 37.33°Culet: NoneDepth 57.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £5,226 GBP|Low: £2,368 GBP|High: £6,067 GBP|Avg: £4,105 GBP|-1.3%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 24, 2026
Retailer 13£2,368 GBP
Retailer 6£3,233 GBP
Retailer 2£3,342 GBP
Retailer 10£3,402 GBP
Retailer 12£3,506 GBP
Retailer 3£3,874 GBP
Retailer 8£3,900 GBP
Retailer 9£4,041 GBP
Retailer 5£4,443 GBP
Retailer 11£4,609 GBP
77 Diamonds£5,226 GBP
Retailer 7£5,307 GBP
Retailer 4£6,067 GBP

11 data points across 13 retailers

2 retailers

B+
Cheapest Retailer
-
£3,874 GBP
Most Expensive
77 Diamonds
MQMBCBCANRVZ · Oct 24
£5,226 GBP
View
Price last confirmed 13 days ago
1 more retailer has this diamond
Prices start from £3,874 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
£3,874 GBP