CaratHunter
Plans
Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

VG • I/SI1 • GIA 1563074038

Certificate GIA 1563074038

Diamond specifications and retailer prices

From £2,741 GBP
As of November 4, 2026
Save £2,171 GBP (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,912 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 1563074038. Listed at 14 retailers as of November 4, 2026, with prices from £2,741 to £4,912, a £2,171 spread on the same certified stone. Helzberg Diamonds lists it at £4,912. 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
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.82°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1563074038
Dimensions10.56 × 5.39 × 3.53 mm
L/W Ratio1.96
Culet sizeNone
Top View
10.56 mm5.39 mm1.20 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1563074038
Side View
Table 58.0%Crown 39.82°Girdle: STK-VTKPavilion 41°Culet: NoneDepth 65.6%

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: £4,912 GBP|Low: £2,741 GBP|High: £5,220 GBP|Avg: £3,591 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£2,741 GBP
Retailer 13£2,784 GBP
Retailer 10£2,865 GBP
Retailer 6£2,871 GBP
Retailer 9£2,929 GBP
Retailer 5£2,991 GBP
Retailer 8£3,144 GBP
Retailer 3£3,473 GBP
Retailer 4£3,499 GBP
Retailer 7£3,523 GBP
Retailer 2£3,803 GBP
Retailer 12£4,623 GBP
Retailer 14£4,880 GBP
Helzberg Diamonds£4,912 GBP

25 data points across 14 retailers

14 retailers£2,741 GBP to £4,912 GBP

B+
Cheapest Retailer
-
£2,741 GBP
B+
Retailer 2
-
£2,784 GBP
View
B+
Retailer 3
-
£2,865 GBP
View
B+
Retailer 4
-
£2,871 GBP
View
B+
Retailer 5
-
£2,929 GBP
View
B+
Retailer 6
-
£2,991 GBP
View
B
Retailer 7
-
£3,144 GBP
View
B
Retailer 8
-
£3,473 GBP
View
B
Retailer 9
-
£3,499 GBP
View
B
Retailer 10
-
£3,523 GBP
View
B
Retailer 11
-
£3,803 GBP
View
B
Retailer 12
-
£4,623 GBP
View
B
Retailer 13
-
£4,880 GBP
View
Most Expensive
B
Helzberg Diamonds
XZRHLMJGNKGJO · Nov 6
£4,912 GBP
$6,575 USD
View
13 more retailers have this diamond
Prices start from £2,741 GBPSave up to £2,171 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
£2,741 GBP