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Marquise|Natural|GIA

1.20ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 6565379734

Certificate GIA 6565379734

Diamond specifications and retailer prices

From $3,371 USD
As of November 2, 2026
Save $3,485 USD (51%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,856 USD at NZ Jewellers · As of October 30, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6565379734. Listed at 15 retailers as of October 30, 2026, with prices from $3,371 to $6,856, a $3,485 spread on the same certified stone. NZ Jewellers lists it at $6,856. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.20
Carat
J
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6565379734
Dimensions10.33 × 5.62 × 3.42 mm
L/W Ratio1.84
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cavity, Knot, Needle
Top View
10.33 mm5.62 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6565379734
Side View
Table 63.0%CrownGirdle: VTN-VTKPavilionCulet: NoneDepth 60.9%

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 2
Current: $6,856 USD|Low: $3,371 USD|High: $6,856 USD|Avg: $4,282 USD
NZ Jewellers
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
Retailer 15
November 2, 2026
Retailer 7$3,371 USD
Retailer 11$3,420 USD
Retailer 12$3,524 USD
Retailer 15$3,745 USD
Retailer 4$3,848 USD
Retailer 10$3,915 USD
Retailer 13$3,915 USD
Retailer 8$4,031 USD
Retailer 3$4,070 USD
Retailer 5$4,070 USD
Retailer 6$4,210 USD
Retailer 2$4,380 USD
Retailer 14$5,742 USD
Retailer 9$6,581 USD
NZ Jewellers$6,856 USD

31 data points across 15 retailers

15 retailers$3,371 USD to $6,856 USD

B+
Cheapest Retailer
-
$3,371 USD
B+
Retailer 2
-
$3,420 USD
CA$4,750 CAD
View
B+
Retailer 3
-
$3,524 USD
View
B
Retailer 4
-
$3,745 USD
View
B
Retailer 5
-
$3,848 USD
View
B
Retailer 6
-
$3,915 USD
View
B
Retailer 7
-
$3,915 USD
View
B
Retailer 8
-
$4,031 USD
£3,174 GBP
View
B
Retailer 9
-
$4,070 USD
View
B
Retailer 10
-
$4,070 USD
View
B
Retailer 11
-
$4,210 USD
View
B
Retailer 12
-
$4,380 USD
€4,171 EUR
View
B
Retailer 13
-
$5,742 USD
View
B
Retailer 14
-
$6,581 USD
£5,182 GBP
View
Most Expensive
B
NZ Jewellers
617fe7ef-dabd-4410-8bcc-3b14343cc3c6 · Oct 30
$6,856 USD
View
14 more retailers have this diamond
Prices start from $3,371 USDSave up to $3,485 USD

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
$3,371 USD