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Marquise|Natural|GIA

1.20ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 7558189177

Certificate GIA 7558189177

Diamond specifications and retailer prices

From $4,934 AUD
As of November 4, 2026
Save $3,908 AUD (44%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,842 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 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 7558189177. Listed at 15 retailers as of November 4, 2026, with prices from $4,934 to $8,842, a $3,908 spread on the same certified stone. Helzberg Diamonds lists it at $8,842. 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
FluorescenceFaint
Crown angle39.96°
Pavilion angle40.45°
OriginNatural
Grading LabGIA
CertificateGIA 7558189177
Dimensions10.13 × 5.47 × 3.52 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.13 mm5.47 mm1.20 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7558189177
Side View
Table 61.0%Crown 39.96°Girdle: MED-VTKPavilion 40.45°Culet: NoneDepth 64.4%

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: $8,842 AUD|Low: $4,934 AUD|High: $9,393 AUD|Avg: $6,542 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$4,934 AUD
Retailer 13$5,014 AUD
Retailer 10$5,156 AUD
Retailer 9$5,273 AUD
Retailer 5$5,385 AUD
Retailer 6$5,632 AUD
Retailer 2$5,695 AUD
Retailer 3$6,276 AUD
Retailer 4$6,347 AUD
Retailer 8$6,561 AUD
Retailer 7$6,845 AUD
Retailer 12$8,321 AUD
Retailer 14$8,834 AUD
Helzberg Diamonds$8,842 AUD

28 data points across 14 retailers

15 retailers$4,934 AUD to $8,842 AUD

B+
Cheapest Retailer
-
$4,934 AUD
B+
Retailer 2
-
$5,014 AUD
View
B+
Retailer 3
-
$5,156 AUD
View
B+
Retailer 4
-
$5,273 AUD
View
B+
Retailer 5
-
$5,385 AUD
View
B+
Retailer 6
-
$5,632 AUD
View
B+
Retailer 7
-
$5,695 AUD
View
B+
Retailer 8
-
$6,276 AUD
View
B+
Retailer 9
-
$6,347 AUD
View
B+
Retailer 10
-
$6,561 AUD
View
B
Retailer 11
-
$6,845 AUD
View
B
Retailer 12
-
$7,175 AUD
View
B
Retailer 13
-
$8,321 AUD
View
B
Retailer 14
-
$8,834 AUD
View
Most Expensive
B
Helzberg Diamonds
XZRNLLOHOPHNN · Nov 6
$8,842 AUD
$6,075 USD
View
14 more retailers have this diamond
Prices start from $4,934 AUDSave up to $3,908 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
$4,934 AUD