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Marquise|Natural|GIA

1.20ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 5553986283

Certificate GIA 5553986283

Diamond specifications and retailer prices

From $3,483 AUD
As of November 6, 2026
Save $4,260 AUD (55%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $8,316 AUD at NZ Jewellers · As of September 27, 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 I 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 5553986283. Listed at 18 retailers as of November 1, 2026, with a 122% 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5553986283
Dimensions10.69 × 5.62 × 3.41 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Crystal, Cavity, Indented Natural, Natural
Top View
10.69 mm5.62 mm1.20 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5553986283
Side View
Table 57.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 60.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $4,790 AUD|Low: $3,464 AUD|High: $7,826 AUD|Avg: $4,712 AUD|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 12$3,483 AUD
Retailer 5$3,611 AUD
Retailer 9$4,194 AUD
Retailer 4$4,273 AUD
Retailer 6$4,552 AUD
Retailer 2$4,630 AUD
Retailer 1$4,790 AUD
Retailer 10$4,809 AUD
Retailer 3$4,838 AUD
Retailer 7$4,852 AUD
Retailer 8$5,389 AUD
Retailer 11$7,743 AUD

28 data points across 12 retailers

18 retailers$3,483 AUD to $7,743 AUD

A
Cheapest Retailer
-
$3,483 AUD
A
Retailer 2
-
$3,611 AUD
View
A
Retailer 3
-
$4,194 AUD
View
B+
Retailer 4
-
$4,273 AUD
View
Final sale: no returns
B+
Retailer 5
-
$4,416 AUD
View
B+
Retailer 6
-
$4,552 AUD
View
Retailer 7
-
$4,630 AUD
View
Price last confirmed 22 days ago
B+
Retailer 8
-
$4,689 AUD
View
Retailer 9
-
$4,774 AUD
View
Price last confirmed 42 days ago
Retailer 10
-
$4,774 AUD
View
Price last confirmed 34 days ago
B+
Retailer 11
-
$4,790 AUD
View
B+
Retailer 12
-
$4,809 AUD
View
B+
Retailer 13
-
$4,838 AUD
View
B+
Retailer 14
-
$4,852 AUD
View
B+
Retailer 15
-
$5,389 AUD
View
Retailer 16
-
$5,507 AUD
View
Price last confirmed 40 days ago
B
Retailer 17
-
$7,743 AUD
View
Most Expensive
NZ Jewellers
53aac2cf-aa17-4cbf-abb5-3d74a658046a · Sep 27
$8,316 AUD
$5,714 USD
View
Price last confirmed 40 days ago
17 more retailers have this diamond
Prices start from $3,483 AUDSave up to $4,260 AUD

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.

A
1.20ct Marquise
$3,483 AUD