Marquise|Natural|GIA

1.20ct G SI2 Marquise Natural Diamond

GD • G/SI2 • GIA 6551515485

Certificate GIA 6551515485

Diamond specifications and retailer prices

From £3,009 GBP
$4,038 USD
As of November 1, 2026
Save £3,056 GBP (50%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £6,369 GBP at NZ Jewellers · As of October 21, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6551515485. Listed at 23 retailers as of November 1, 2026, with a 102% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
G
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle42.53°
Pavilion angle37.56°
OriginNatural
Grading LabGIA
CertificateGIA 6551515485
Dimensions10.01 × 5.44 × 3.47 mm
L/W Ratio1.84
Culet sizeNone
Top View
10.01 mm5.44 mm1.20 ctG / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551515485
Side View
Table 58.0%Crown 42.53°Girdle: STK-VTKPavilion 37.56°Culet: NoneDepth 63.7%

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 1
Current: £3,765 GBP|Low: £3,184 GBP|High: £6,138 GBP|Avg: £4,407 GBP|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 7£3,184 GBP
Retailer 6£3,450 GBP
Retailer 1£3,765 GBP
Retailer 3£3,802 GBP
Retailer 2£4,308 GBP
Retailer 5£5,707 GBP
Retailer 4£6,065 GBP

38 data points across 7 retailers

23 retailers£3,009 GBP to £6,065 GBP

B+
Cheapest Retailer
-
£3,009 GBP
$4,038 USD
B
Retailer 2
-
£3,184 GBP
$4,273 USD
View
Final sale: no returns
B
Retailer 3
-
£3,211 GBP
$4,309 USD
View
B
Retailer 4
-
£3,426 GBP
$4,597 USD
View
B
Retailer 5
-
£3,450 GBP
$4,630 USD
View
Retailer 6
-
£3,450 GBP
$4,630 USD
View
Price last confirmed 32 days ago
Retailer 7
-
£3,450 GBP
$4,630 USD
View
Price last confirmed 26 days ago
B
Retailer 8
-
£3,450 GBP
$4,630 USD
View
Retailer 9
-
£3,450 GBP
$4,630 USD
View
Price last confirmed 11 days ago
B
Retailer 10
-
£3,726 GBP
$5,000 USD
View
B
Retailer 11
-
£3,726 GBP
$5,000 USD
View
B
Retailer 12
-
£3,765 GBP
View
B
Retailer 13
-
£3,802 GBP
View
B
Retailer 14
-
£3,845 GBP
$5,160 USD
View
B
Retailer 15
-
£3,981 GBP
$5,342 USD
View
Retailer 16
-
£3,981 GBP
$5,342 USD
View
Price last confirmed 24 days ago
Retailer 17
-
£3,981 GBP
$5,342 USD
View
Price last confirmed 12 days ago
Retailer 18
-
£4,204 GBP
$5,641 USD
View
Price last confirmed 18 days ago
B
Retailer 19
-
£4,308 GBP
€5,506 EUR
View
C
Retailer 20
-
£5,707 GBP
View
C
Retailer 21
-
£6,065 GBP
View
Retailer 22
-
£6,369 GBP
$8,547 USD
View
Price last confirmed 33 days ago
Most Expensive
NZ Jewellers
60fa1b14-bc62-4775-852e-347243f6c78a · Oct 21
£6,369 GBP
$8,547 USD
View
Price last confirmed 12 days ago
22 more retailers have this diamond
Prices start from £3,009 GBPSave up to £3,056 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
£3,009 GBP