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Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

VG • I/SI1 • GIA 1563074038

Certificate GIA 1563074038

Diamond specifications and retailer prices

From $5,340 AUD
As of November 4, 2026
Save $4,229 AUD (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $9,569 AUD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 1563074038. Listed at 14 retailers as of November 4, 2026, with prices from $5,340 to $9,569, a $4,229 spread on the same certified stone. Helzberg Diamonds lists it at $9,569. 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
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.82°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1563074038
Dimensions10.56 × 5.39 × 3.53 mm
L/W Ratio1.96
Culet sizeNone
Top View
10.56 mm5.39 mm1.20 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1563074038
Side View
Table 58.0%Crown 39.82°Girdle: STK-VTKPavilion 41°Culet: NoneDepth 65.6%

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 4
Current: $9,569 AUD|Low: $5,340 AUD|High: $10,169 AUD|Avg: $6,989 AUD|-5.9%
Helzberg Diamonds
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
November 7, 2026
Retailer 11$5,340 AUD
Retailer 13$5,424 AUD
Retailer 10$5,581 AUD
Retailer 6$5,593 AUD
Retailer 9$5,707 AUD
Retailer 5$5,827 AUD
Retailer 2$6,161 AUD
Retailer 3$6,765 AUD
Retailer 4$6,816 AUD
Retailer 8$6,864 AUD
Retailer 7$7,408 AUD
Retailer 12$9,006 AUD
Retailer 14$9,507 AUD
Helzberg Diamonds$9,569 AUD

26 data points across 14 retailers

14 retailers$5,340 AUD to $9,569 AUD

B+
Cheapest Retailer
-
$5,340 AUD
B+
Retailer 2
-
$5,424 AUD
View
B+
Retailer 3
-
$5,581 AUD
View
B+
Retailer 4
-
$5,593 AUD
View
B+
Retailer 5
-
$5,707 AUD
View
B+
Retailer 6
-
$5,827 AUD
View
B
Retailer 7
-
$6,161 AUD
View
B
Retailer 8
-
$6,765 AUD
View
B
Retailer 9
-
$6,816 AUD
View
B
Retailer 10
-
$6,864 AUD
View
B
Retailer 11
-
$7,408 AUD
View
B
Retailer 12
-
$9,006 AUD
View
B
Retailer 13
-
$9,507 AUD
View
Most Expensive
B
Helzberg Diamonds
XZRHLMJGNKGJO · Nov 6
$9,569 AUD
$6,575 USD
View
13 more retailers have this diamond
Prices start from $5,340 AUDSave up to $4,229 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
$5,340 AUD