Marquise|Natural|GIA

1.20ct J SI2 Marquise Natural Diamond

EX • J/SI2 • GIA 3545449954

Certificate GIA 3545449954

Diamond specifications and retailer prices

From $3,317 USD
As of November 6, 2026
Save $3,570 USD (52%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: $7,554 USD at NZ Jewellers · As of September 29, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 3545449954. Listed at 26 retailers as of November 4, 2026, with a 108% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle38.39°
Pavilion angle39.22°
OriginNatural
Grading LabGIA
CertificateGIA 3545449954
Dimensions10.52 × 5.58 × 3.39 mm
L/W Ratio1.89
Top View
10.52 mm5.58 mm1.20 ctJ / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 3545449954
Side View
Table 64.0%Crown 38.39°Girdle: THN-VTKPavilion 39.22°Culet: NoneDepth 60.8%

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 6
Current: $4,321 USD|Low: $3,317 USD|High: $6,988 USD|Avg: $4,414 USD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 2$3,317 USD
Retailer 8$3,457 USD
Retailer 9$3,594 USD
Retailer 7$3,625 USD
Retailer 6$3,928 USD
Retailer 1$4,321 USD
Retailer 3$4,392 USD
Retailer 5$4,905 USD
Retailer 4$6,887 USD

39 data points across 9 retailers

26 retailers$3,317 USD to $6,887 USD

B+
Cheapest Retailer
-
$3,317 USD
B
Retailer 2
-
$3,457 USD
View
B
Retailer 3
-
$3,594 USD
View
B
Retailer 4
-
$3,625 USD
View
Final sale: no returns
B
Retailer 5
-
$3,920 USD
View
Retailer 6
-
$3,928 USD
View
Price last confirmed 29 days ago
B
Retailer 7
-
$3,928 USD
View
Retailer 8
-
$3,928 USD
View
Price last confirmed 36 days ago
Retailer 9
-
$3,928 USD
View
Price last confirmed 15 days ago
Retailer 10
-
$3,928 USD
View
Price last confirmed 8 days ago
Retailer 11
-
$3,928 USD
View
Price last confirmed 46 days ago
B
Retailer 12
-
$3,928 USD
View
B
Retailer 13
-
$4,260 USD
View
B
Retailer 14
-
$4,260 USD
View
B
Retailer 15
-
$4,321 USD
View
B
Retailer 16
-
$4,392 USD
View
B
Retailer 17
-
$4,400 USD
View
Retailer 18
-
$4,533 USD
View
Price last confirmed 46 days ago
Retailer 19
-
$4,533 USD
View
Price last confirmed 28 days ago
Retailer 20
-
$4,533 USD
View
Price last confirmed 16 days ago
Retailer 21
-
$4,905 USD
View
Price last confirmed 22 days ago
B
Retailer 22
-
$4,905 USD
View
B
Retailer 23
-
$6,887 USD
View
Retailer 24
-
$7,554 USD
View
Price last confirmed 47 days ago
Retailer 25
-
$7,554 USD
View
Price last confirmed 16 days ago
Most Expensive
NZ Jewellers
f4851853-d466-4855-8954-055568be135e · Sep 29
$7,554 USD
View
Price last confirmed 38 days ago
25 more retailers have this diamond
Prices start from $3,317 USDSave up to $3,570 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
$3,317 USD