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Marquise|Natural|GIA

1.20ct J SI1 Marquise Natural Diamond

VG • J/SI1 • GIA 7562711418

Certificate GIA 7562711418

Diamond specifications and retailer prices

From $4,852 AUD
$3,400 USD
As of October 31, 2026
Save $3,841 AUD (44%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,693 AUD at Helzberg Diamonds · As of November 3, 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 J 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 7562711418. Listed at 15 retailers as of October 31, 2026, with prices from $4,852 to $8,693, a $3,841 spread on the same certified stone. Helzberg Diamonds lists it at $8,693. 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
J
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.99°
Pavilion angle37.84°
OriginNatural
Grading LabGIA
CertificateGIA 7562711418
Dimensions10.46 × 5.58 × 3.33 mm
L/W Ratio1.87
Culet sizeNone
Top View
10.46 mm5.58 mm1.20 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7562711418
Side View
Table 59.0%Crown 37.99°Girdle: STK-VTKPavilion 37.84°Culet: NDepth 59.6%

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: Oct 31
Current: $8,693 AUD|Low: $4,852 AUD|High: $8,693 AUD|Avg: $6,145 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
Retailer 15
November 3, 2026
Retailer 11$4,852 AUD
Retailer 7$4,876 AUD
Retailer 4$4,931 AUD
Retailer 8$4,963 AUD
Retailer 3$5,185 AUD
Retailer 12$5,258 AUD
Retailer 6$5,295 AUD
Retailer 9$5,610 AUD
Retailer 14$6,170 AUD
Retailer 5$6,240 AUD
Retailer 10$6,266 AUD
Retailer 2$6,731 AUD
Retailer 13$8,182 AUD
Retailer 15$8,630 AUD
Helzberg Diamonds$8,693 AUD

11 data points across 15 retailers

15 retailers$4,852 AUD to $8,693 AUD

B+
Cheapest Retailer
-
$4,852 AUD
$3,400 USD
B+
Retailer 2
-
$4,876 AUD
$3,417 USD
View
B
Retailer 3
-
$4,931 AUD
$3,456 USD
View
B
Retailer 4
-
$4,963 AUD
SGD 4,700 SGD
View
B
Retailer 5
-
$5,185 AUD
$3,634 USD
View
B
Retailer 6
-
$5,258 AUD
$3,685 USD
View
B
Retailer 7
-
$5,295 AUD
SGD 5,015 SGD
View
B
Retailer 8
-
$5,610 AUD
£3,096 GBP
View
B
Retailer 9
-
$6,170 AUD
$4,324 USD
View
B
Retailer 10
-
$6,240 AUD
$4,373 USD
View
B
Retailer 11
-
$6,266 AUD
€4,182 EUR
View
B
Retailer 12
-
$6,731 AUD
$4,717 USD
View
C
Retailer 13
-
$8,182 AUD
$5,734 USD
View
C
Retailer 14
-
$8,630 AUD
$6,048 USD
View
Most Expensive
C
Helzberg Diamonds
XZRNLMINHHKHO · Nov 3
$8,693 AUD
$6,092 USD
View
14 more retailers have this diamond
Prices start from $4,852 AUDSave up to $3,841 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
$4,852 AUD