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Marquise|Natural|GIA

1.21ct I SI2 Marquise Natural Diamond

VG • I/SI2 • GIA 7566562402

Certificate GIA 7566562402

Diamond specifications and retailer prices

From £2,433 GBP
As of November 6, 2026
Save £2,087 GBP (46%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £4,521 GBP at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 7566562402. Listed at 8 retailers as of November 6, 2026, with prices from £2,433 to £4,521, a £2,087 spread on the same certified stone. Helzberg Diamonds lists it at £4,521. 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
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.92°
Pavilion angle40.83°
OriginNatural
Grading LabGIA
CertificateGIA 7566562402
Dimensions10.30 × 5.56 × 3.62 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.30 mm5.56 mm1.21 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7566562402
Side View
Table 61.0%Crown 40.92°Girdle: THN-VTKPavilion 40.83°Culet: NDepth 65.1%

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: £4,521 GBP|Low: £2,433 GBP|High: £4,521 GBP|Avg: £3,125 GBP
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8£2,433 GBP
Retailer 2£2,540 GBP
Retailer 7£2,728 GBP
Retailer 6£2,863 GBP
Retailer 5£3,078 GBP
Retailer 4£3,297 GBP
Retailer 3£4,232 GBP
Helzberg Diamonds£4,521 GBP

2 data points across 8 retailers

8 retailers£2,433 GBP to £4,521 GBP

B+
Cheapest Retailer
-
£2,433 GBP
B+
Retailer 2
-
£2,540 GBP
View
B+
Retailer 3
-
£2,728 GBP
View
B
Retailer 4
-
£2,863 GBP
View
B
Retailer 5
-
£3,078 GBP
View
B
Retailer 6
-
£3,297 GBP
View
B
Retailer 7
-
£4,232 GBP
View
Most Expensive
C
Helzberg Diamonds
XZRNLMMLMIKGI · Nov 6
£4,521 GBP
$6,051 USD
View
7 more retailers have this diamond
Prices start from £2,433 GBPSave up to £2,087 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
£2,433 GBP