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Marquise|Natural|GIA

1.20ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 7556752755

Certificate GIA 7556752755

Diamond specifications and retailer prices

From $5,766 AUD
As of November 5, 2026
Save $4,491 AUD (44%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $10,258 AUD at Helzberg Diamonds · As of November 4, 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 H 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 7556752755. Listed at 15 retailers as of November 4, 2026, with prices from $5,766 to $10,258, a $4,491 spread on the same certified stone. Helzberg Diamonds lists it at $10,258. 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
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.35°
Pavilion angle40.4°
OriginNatural
Grading LabGIA
CertificateGIA 7556752755
Dimensions10.12 × 5.47 × 3.60 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.12 mm5.47 mm1.20 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7556752755
Side View
Table 59.0%Crown 40.35°Girdle: VTN-VTKPavilion 40.4°Culet: NoneDepth 65.7%

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 5
Current: $10,258 AUD|Low: $5,766 AUD|High: $10,898 AUD|Avg: $7,518 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 12$5,766 AUD
Retailer 5$5,861 AUD
Retailer 9$5,926 AUD
Retailer 7$5,983 AUD
Retailer 6$6,188 AUD
Retailer 4$6,247 AUD
Retailer 2$6,450 AUD
Retailer 14$7,226 AUD
Retailer 3$7,258 AUD
Retailer 11$7,377 AUD
Retailer 8$7,941 AUD
Retailer 10$9,654 AUD
Retailer 13$10,201 AUD
Helzberg Diamonds$10,258 AUD

29 data points across 14 retailers

15 retailers$5,766 AUD to $10,258 AUD

B+
Cheapest Retailer
-
$5,766 AUD
B+
Retailer 2
-
$5,861 AUD
View
B+
Retailer 3
-
$5,926 AUD
View
B+
Retailer 4
-
$5,983 AUD
View
B
Retailer 5
-
$6,188 AUD
View
B+
Retailer 6
-
$6,247 AUD
View
B+
Retailer 7
-
$6,450 AUD
View
B
Retailer 8
-
$7,226 AUD
View
B
Retailer 9
-
$7,258 AUD
View
B
Retailer 10
-
$7,377 AUD
View
B
Retailer 11
-
$7,734 AUD
View
B
Retailer 12
-
$7,941 AUD
View
B
Retailer 13
-
$9,654 AUD
View
B
Retailer 14
-
$10,201 AUD
View
Most Expensive
B
Helzberg Diamonds
XZRNLLMNLINLL · Nov 4
$10,258 AUD
$7,048 USD
View
14 more retailers have this diamond
Prices start from $5,766 AUDSave up to $4,491 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
$5,766 AUD