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Marquise|Natural|GIA

1.20ct J IF Marquise Natural Diamond

VG • J/IF • GIA 3555701588

Certificate GIA 3555701588

Diamond specifications and retailer prices

From £3,439 GBP
$4,615 USD
As of November 3, 2026
Save £670 GBP (16%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £4,109 GBP at Blue Nile · As of November 3, 2026
View at Blue Nile

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-carat band, graded J colour (near-colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 3555701588. Listed at 3 retailers as of November 3, 2026, with prices from £3,439 to £4,109, a £670 spread on the same certified stone. Blue Nile lists it at £4,109. 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
J
Colour
IF
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37°
Pavilion angle40.4°
OriginNatural
Grading LabGIA
CertificateGIA 3555701588
Dimensions10.18 × 5.46 × 3.57 mm
L/W Ratio1.86
Girdle conditionFaceted
Culet sizeNone
Top View
10.18 mm5.46 mm1.20 ctJ / IF
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 3555701588
Side View
Table 59.0%Crown 37°Girdle: STK-VTKPavilion 40.4°Culet: NoneDepth 65.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 3
Current: £4,109 GBP|Low: £3,439 GBP|High: £4,333 GBP|Avg: £3,824 GBP|-5.2%
Blue Nile
Retailer 2
Retailer 3
November 3, 2026
Retailer 2£3,439 GBP
Retailer 3£3,667 GBP
Blue Nile£4,109 GBP

44 data points across 3 retailers

3 retailers£3,439 GBP to £4,109 GBP

B+
Cheapest Retailer
-
£3,439 GBP
$4,615 USD
B
Retailer 2
-
£3,667 GBP
View
Most Expensive
B
Blue Nile
29711099 · Nov 3
£4,109 GBP
$5,514 USD
View
2 more retailers have this diamond
Prices start from £3,439 GBPSave up to £670 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
£3,439 GBP