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Marquise|Natural|GIA

1.20ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 7556752755

Certificate GIA 7556752755

Diamond specifications and retailer prices

From £2,960 GBP
As of November 5, 2026
Save £2,306 GBP (44%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £5,266 GBP at Helzberg Diamonds · As of November 4, 2026
View at Helzberg Diamonds

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 7556752755. Listed at 15 retailers as of November 4, 2026, with prices from £2,960 to £5,266, a £2,306 spread on the same certified stone. Helzberg Diamonds lists it at £5,266. 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

1.20
Carat
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.35°
Pavilion angle40.4°
OriginNatural
Grading LabGIA
CertificateGIA 7556752755
Dimensions10.12 × 5.47 × 3.60 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.12 mm5.47 mm1.20 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7556752755
Side View
Table 59.0%Crown 40.35°Girdle: VTN-VTKPavilion 40.4°Culet: NoneDepth 65.7%

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 5
Current: £5,266 GBP|Low: £2,960 GBP|High: £5,594 GBP|Avg: £3,866 GBP|-5.9%
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
Retailer 14
November 5, 2026
Retailer 12£2,960 GBP
Retailer 5£3,009 GBP
Retailer 9£3,042 GBP
Retailer 2£3,071 GBP
Retailer 6£3,177 GBP
Retailer 4£3,207 GBP
Retailer 7£3,311 GBP
Retailer 14£3,709 GBP
Retailer 3£3,726 GBP
Retailer 11£3,787 GBP
Retailer 8£4,076 GBP
Retailer 10£4,956 GBP
Retailer 13£5,236 GBP
Helzberg Diamonds£5,266 GBP

29 data points across 14 retailers

15 retailers£2,960 GBP to £5,266 GBP

B+
Cheapest Retailer
-
£2,960 GBP
B+
Retailer 2
-
£3,009 GBP
View
B+
Retailer 3
-
£3,042 GBP
View
B+
Retailer 4
-
£3,071 GBP
View
B
Retailer 5
-
£3,177 GBP
View
B+
Retailer 6
-
£3,207 GBP
View
B+
Retailer 7
-
£3,311 GBP
View
B
Retailer 8
-
£3,709 GBP
View
B
Retailer 9
-
£3,726 GBP
View
B
Retailer 10
-
£3,787 GBP
View
B
Retailer 11
-
£3,970 GBP
View
B
Retailer 12
-
£4,076 GBP
View
B
Retailer 13
-
£4,956 GBP
View
B
Retailer 14
-
£5,236 GBP
View
Most Expensive
B
Helzberg Diamonds
XZRNLLMNLINLL · Nov 4
£5,266 GBP
$7,048 USD
View
14 more retailers have this diamond
Prices start from £2,960 GBPSave up to £2,306 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+
1.20ct Marquise
£2,960 GBP