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Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 5553433569

Certificate GIA 5553433569

Diamond specifications and retailer prices

From $4,488 AUD
As of November 6, 2026
Save $5,407 AUD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $11,212 AUD at NZ Jewellers · As of September 28, 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 SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5553433569. Listed at 21 retailers as of November 4, 2026, with a 120% 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
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle45.5°
Pavilion angle38.5°
OriginNatural
Grading LabGIA
CertificateGIA 5553433569
Dimensions9.45 × 5.42 × 3.71 mm
L/W Ratio1.74
Girdle conditionFaceted
Top View
9.45 mm5.42 mm1.20 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5553433569
Side View
Table 67.0%Crown 45.5°Girdle: THK-ETKPavilion 38.5°Culet: NDepth 68.5%

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 6
Current: $6,009 AUD|Low: $4,471 AUD|High: $10,010 AUD|Avg: $6,038 AUD|-5.4%
Retailer 1
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
Retailer 16
Retailer 17
November 7, 2026
Retailer 6$4,488 AUD
Retailer 3$4,602 AUD
Retailer 5$4,772 AUD
Retailer 4$4,862 AUD
Retailer 8$4,961 AUD
Retailer 13$5,152 AUD
Retailer 15$5,586 AUD
Retailer 10$5,756 AUD
Retailer 1$6,009 AUD
Retailer 7$6,084 AUD
Retailer 16$6,084 AUD
Retailer 17$6,287 AUD
Retailer 14$6,686 AUD
Retailer 9$6,739 AUD
Retailer 2$7,050 AUD
Retailer 11$7,242 AUD
Retailer 12$9,895 AUD

24 data points across 17 retailers

21 retailers$4,488 AUD to $9,895 AUD

B+
Cheapest Retailer
-
$4,488 AUD
B+
Retailer 2
-
$4,602 AUD
View
B+
Retailer 3
-
$4,772 AUD
View
B+
Retailer 4
-
$4,862 AUD
View
B+
Retailer 5
-
$4,961 AUD
View
Final sale: no returns
B+
Retailer 6
-
$5,152 AUD
View
B
Retailer 7
-
$5,586 AUD
View
B
Retailer 8
-
$5,756 AUD
View
Retailer 9
-
$5,830 AUD
View
Price last confirmed 40 days ago
B
Retailer 10
-
$6,009 AUD
View
B
Retailer 11
-
$6,084 AUD
View
B
Retailer 12
-
$6,084 AUD
View
B
Retailer 13
-
$6,287 AUD
View
B
Retailer 14
-
$6,686 AUD
View
Retailer 15
-
$6,727 AUD
View
Price last confirmed 39 days ago
Retailer 16
-
$6,739 AUD
View
Price last confirmed 15 days ago
Retailer 17
-
$6,821 AUD
View
Price last confirmed 39 days ago
B
Retailer 18
-
$7,050 AUD
View
B
Retailer 19
-
$7,242 AUD
View
C
Retailer 20
-
$9,895 AUD
View
Most Expensive
NZ Jewellers
2614a395-b61f-45fd-9a07-4b2d0db037a7 · Sep 28
$11,212 AUD
$7,704 USD
View
Price last confirmed 40 days ago
20 more retailers have this diamond
Prices start from $4,488 AUDSave up to $5,407 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.

B+
1.20ct Marquise
$4,488 AUD