CaratHunter
Plans
Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 7568597454

Certificate GIA 7568597454

Diamond specifications and retailer prices

From $4,681 AUD
As of November 4, 2026
Save $4,221 AUD (47%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $8,901 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 7568597454. Listed at 14 retailers as of November 4, 2026, with prices from $4,681 to $8,901, a $4,221 spread on the same certified stone. Helzberg Diamonds lists it at $8,901. 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
FluorescenceStrong
Crown angle38.98°
Pavilion angle40.29°
OriginNatural
Grading LabGIA
CertificateGIA 7568597454
Dimensions10.11 × 5.45 × 3.56 mm
L/W Ratio1.86
Culet sizeNone
Top View
10.11 mm5.45 mm1.20 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 7568597454
Side View
Table 55.0%Crown 38.98°Girdle: STK-ETKPavilion 40.29°Culet: NDepth 65.4%

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: $8,901 AUD|Low: $4,681 AUD|High: $8,901 AUD|Avg: $6,124 AUD
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 13$4,681 AUD
Retailer 11$4,759 AUD
Retailer 8$4,794 AUD
Retailer 6$5,001 AUD
Retailer 12$5,087 AUD
Retailer 2$5,405 AUD
Retailer 5$5,638 AUD
Retailer 9$5,928 AUD
Retailer 14$5,970 AUD
Retailer 4$6,054 AUD
Retailer 7$6,223 AUD
Retailer 10$7,894 AUD
Retailer 3$8,360 AUD
Helzberg Diamonds$8,901 AUD

24 data points across 14 retailers

14 retailers$4,681 AUD to $8,901 AUD

B+
Cheapest Retailer
-
$4,681 AUD
B+
Retailer 2
-
$4,759 AUD
View
B+
Retailer 3
-
$4,794 AUD
View
B
Retailer 4
-
$5,001 AUD
View
B
Retailer 5
-
$5,087 AUD
View
B
Retailer 6
-
$5,405 AUD
View
B
Retailer 7
-
$5,638 AUD
View
B
Retailer 8
-
$5,928 AUD
View
B
Retailer 9
-
$5,970 AUD
View
B
Retailer 10
-
$6,054 AUD
View
B
Retailer 11
-
$6,223 AUD
View
C
Retailer 12
-
$7,894 AUD
View
C
Retailer 13
-
$8,360 AUD
View
Most Expensive
C
Helzberg Diamonds
XZRNLMOLPNKLK · Nov 6
$8,901 AUD
$6,116 USD
View
13 more retailers have this diamond
Prices start from $4,681 AUDSave up to $4,221 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
$4,681 AUD