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Marquise|Natural|GIA

1.20ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 7558189177

Certificate GIA 7558189177

Diamond specifications and retailer prices

From £2,533 GBP
As of November 4, 2026
Save £2,006 GBP (44%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,539 GBP at Helzberg Diamonds · As of November 6, 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 7558189177. Listed at 15 retailers as of November 4, 2026, with prices from £2,533 to £4,539, a £2,006 spread on the same certified stone. Helzberg Diamonds lists it at £4,539. 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
FluorescenceFaint
Crown angle39.96°
Pavilion angle40.45°
OriginNatural
Grading LabGIA
CertificateGIA 7558189177
Dimensions10.13 × 5.47 × 3.52 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.13 mm5.47 mm1.20 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7558189177
Side View
Table 61.0%Crown 39.96°Girdle: MED-VTKPavilion 40.45°Culet: NoneDepth 64.4%

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: £4,539 GBP|Low: £2,533 GBP|High: £4,822 GBP|Avg: £3,365 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 6, 2026
Retailer 11£2,533 GBP
Retailer 13£2,574 GBP
Retailer 10£2,647 GBP
Retailer 9£2,707 GBP
Retailer 5£2,764 GBP
Retailer 6£2,891 GBP
Retailer 8£2,906 GBP
Retailer 3£3,222 GBP
Retailer 4£3,258 GBP
Retailer 7£3,368 GBP
Retailer 2£3,514 GBP
Retailer 12£4,271 GBP
Retailer 14£4,535 GBP
Helzberg Diamonds£4,539 GBP

28 data points across 14 retailers

15 retailers£2,533 GBP to £4,539 GBP

B+
Cheapest Retailer
-
£2,533 GBP
B+
Retailer 2
-
£2,574 GBP
View
B+
Retailer 3
-
£2,647 GBP
View
B+
Retailer 4
-
£2,707 GBP
View
B+
Retailer 5
-
£2,764 GBP
View
B+
Retailer 6
-
£2,891 GBP
View
B+
Retailer 7
-
£2,906 GBP
View
B+
Retailer 8
-
£3,222 GBP
View
B+
Retailer 9
-
£3,258 GBP
View
B+
Retailer 10
-
£3,368 GBP
View
B
Retailer 11
-
£3,514 GBP
View
B
Retailer 12
-
£3,683 GBP
View
B
Retailer 13
-
£4,271 GBP
View
B
Retailer 14
-
£4,535 GBP
View
Most Expensive
B
Helzberg Diamonds
XZRNLLOHOPHNN · Nov 6
£4,539 GBP
$6,075 USD
View
14 more retailers have this diamond
Prices start from £2,533 GBPSave up to £2,006 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
£2,533 GBP