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Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 7568597454

Certificate GIA 7568597454

Diamond specifications and retailer prices

From £2,403 GBP
As of November 4, 2026
Save £2,167 GBP (47%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,569 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 7568597454. Listed at 14 retailers as of November 4, 2026, with prices from £2,403 to £4,569, a £2,167 spread on the same certified stone. Helzberg Diamonds lists it at £4,569. 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
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle38.98°
Pavilion angle40.29°
OriginNatural
Grading LabGIA
CertificateGIA 7568597454
Dimensions10.11 × 5.45 × 3.56 mm
L/W Ratio1.86
Culet sizeNone
Top View
10.11 mm5.45 mm1.20 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 7568597454
Side View
Table 55.0%Crown 38.98°Girdle: STK-ETKPavilion 40.29°Culet: NDepth 65.4%

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: £4,569 GBP|Low: £2,403 GBP|High: £4,569 GBP|Avg: £3,146 GBP
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 13£2,403 GBP
Retailer 11£2,443 GBP
Retailer 8£2,461 GBP
Retailer 6£2,567 GBP
Retailer 12£2,611 GBP
Retailer 7£2,758 GBP
Retailer 5£2,894 GBP
Retailer 9£3,043 GBP
Retailer 14£3,065 GBP
Retailer 4£3,108 GBP
Retailer 2£3,195 GBP
Retailer 10£4,052 GBP
Retailer 3£4,291 GBP
Helzberg Diamonds£4,569 GBP

23 data points across 14 retailers

14 retailers£2,403 GBP to £4,569 GBP

B+
Cheapest Retailer
-
£2,403 GBP
B+
Retailer 2
-
£2,443 GBP
View
B+
Retailer 3
-
£2,461 GBP
View
B
Retailer 4
-
£2,567 GBP
View
B
Retailer 5
-
£2,611 GBP
View
B
Retailer 6
-
£2,758 GBP
View
B
Retailer 7
-
£2,894 GBP
View
B
Retailer 8
-
£3,043 GBP
View
B
Retailer 9
-
£3,065 GBP
View
B
Retailer 10
-
£3,108 GBP
View
B
Retailer 11
-
£3,195 GBP
View
C
Retailer 12
-
£4,052 GBP
View
C
Retailer 13
-
£4,291 GBP
View
Most Expensive
C
Helzberg Diamonds
XZRNLMOLPNKLK · Nov 6
£4,569 GBP
$6,116 USD
View
13 more retailers have this diamond
Prices start from £2,403 GBPSave up to £2,167 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
£2,403 GBP