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Marquise|Natural|GIA

1.21ct H SI2 Marquise Natural Diamond

VG • H/SI2 • GIA 1569645931

Certificate GIA 1569645931

Diamond specifications and retailer prices

From £2,409 GBP
As of November 4, 2026
Save £2,155 GBP (47%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,563 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 H 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 1569645931. Listed at 13 retailers as of November 4, 2026, with prices from £2,409 to £4,563, a £2,155 spread on the same certified stone. Helzberg Diamonds lists it at £4,563. 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
H
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle36.4°
Pavilion angle42.04°
OriginNatural
Grading LabGIA
CertificateGIA 1569645931
Dimensions10.26 × 5.54 × 3.57 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.26 mm5.54 mm1.21 ctH / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1569645931
Side View
Table 61.0%Crown 36.4°Girdle: STK-VTKPavilion 42.04°Culet: NDepth 64.5%

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 4
Current: £4,563 GBP|Low: £2,409 GBP|High: £4,563 GBP|Avg: £3,038 GBP|+5.3%
Helzberg 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
November 6, 2026
Retailer 3£2,409 GBP
Retailer 11£2,449 GBP
Retailer 10£2,477 GBP
Retailer 4£2,535 GBP
Retailer 2£2,565 GBP
Retailer 5£2,626 GBP
Retailer 9£2,755 GBP
Retailer 13£2,891 GBP
Retailer 12£3,105 GBP
Retailer 8£3,192 GBP
Retailer 7£3,329 GBP
Retailer 6£4,285 GBP
Helzberg Diamonds£4,563 GBP

19 data points across 13 retailers

13 retailers£2,409 GBP to £4,563 GBP

B+
Cheapest Retailer
-
£2,409 GBP
B+
Retailer 2
-
£2,449 GBP
View
B+
Retailer 3
-
£2,477 GBP
View
B+
Retailer 4
-
£2,535 GBP
View
B+
Retailer 5
-
£2,565 GBP
View
B+
Retailer 6
-
£2,626 GBP
View
B+
Retailer 7
-
£2,755 GBP
View
B
Retailer 8
-
£2,891 GBP
View
B
Retailer 9
-
£3,105 GBP
View
B
Retailer 10
-
£3,192 GBP
View
B
Retailer 11
-
£3,329 GBP
View
B
Retailer 12
-
£4,285 GBP
View
Most Expensive
C
Helzberg Diamonds
XZRHLMPMKLPJH · Nov 6
£4,563 GBP
$6,108 USD
View
12 more retailers have this diamond
Prices start from £2,409 GBPSave up to £2,155 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
£2,409 GBP