Marquise|Natural|GIA

1.20ct H SI1 Marquise Natural Diamond

ID • H/SI1 • GIA 2557359146

Certificate GIA 2557359146

Diamond specifications and retailer prices

From $8,105 AUD
As of November 5, 2026
Save $1,391 AUD (15%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $15,017 AUD at NZ Jewellers · As of October 24, 2026
View at NZ Jewellers

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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557359146. Listed at 20 retailers as of November 5, 2026, with a relatively tight 17% spread, which is unusual at this carat range and suggests competitive pricing across the listings. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.20
Carat
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.24°
Pavilion angle41.41°
OriginNatural
Grading LabGIA
CertificateGIA 2557359146
Dimensions10.40 × 5.52 × 3.52 mm
L/W Ratio1.88
Girdle conditionVery Thick
Key to symbols
Crystal, Feather, Needle, Indented Natural
Top View
10.40 mm5.52 mm1.20 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557359146
Side View
Table 63.0%Crown 38.24°Girdle: Slightly ThickPavilion 41.41°Culet: NoneDepth 63.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: $15,017 AUD|Low: $7,094 AUD|High: $15,017 AUD|Avg: $9,027 AUD
NZ Jewellers
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
November 6, 2026
Retailer 7$7,094 AUD
Retailer 6$7,147 AUD
Retailer 4$7,153 AUD
Retailer 15$7,306 AUD
Retailer 22$7,571 AUD
Retailer 23$7,612 AUD
Retailer 12$8,035 AUD
Retailer 9$8,105 AUD
Retailer 3$8,134 AUD
Retailer 19$8,134 AUD
Retailer 21$8,134 AUD
Retailer 16$8,462 AUD
Retailer 10$8,548 AUD
Retailer 17$8,561 AUD
Retailer 20$8,767 AUD
Retailer 2$8,863 AUD
Retailer 11$9,496 AUD
Retailer 18$9,758 AUD
Retailer 14$9,903 AUD
Retailer 13$10,933 AUD
Retailer 8$13,139 AUD
Retailer 5$13,244 AUD
NZ Jewellers$15,017 AUD

9 data points across 23 retailers

20 retailers$8,105 AUD to $9,496 AUD

Retailer 1
-
$7,094 AUD
Price last confirmed 12 days ago
Retailer 2
-
$7,147 AUD
View
Price last confirmed 12 days ago
Retailer 3
-
$7,153 AUD
View
Price last confirmed 13 days ago
Retailer 4
-
$7,571 AUD
View
Price last confirmed 13 days ago
Retailer 5
-
$7,612 AUD
View
Price last confirmed 11 days ago
Retailer 6
-
$8,035 AUD
View
Price last confirmed 13 days ago
B
Retailer 7
-
$8,105 AUD
View
Retailer 8
-
$8,134 AUD
View
Price last confirmed 12 days ago
Retailer 9
-
$8,134 AUD
View
Price last confirmed 13 days ago
Retailer 10
-
$8,134 AUD
View
Price last confirmed 13 days ago
B
Retailer 11
-
$8,548 AUD
View
Retailer 12
-
$8,561 AUD
View
Price last confirmed 11 days ago
B
Retailer 13
-
$8,863 AUD
View
B
Retailer 14
-
$9,496 AUD
View
Retailer 15
-
$9,758 AUD
View
Price last confirmed 12 days ago
Retailer 16
-
$9,903 AUD
View
Price last confirmed 29 days ago
Retailer 17
-
$10,933 AUD
View
Price last confirmed 11 days ago
Retailer 18
-
$13,139 AUD
View
Price last confirmed 15 days ago
Retailer 19
-
$13,244 AUD
View
Price last confirmed 12 days ago
Most Expensive
NZ Jewellers
1844168c-8e69-4a0c-b643-6b09d37bb58f · Oct 24
$15,017 AUD
$10,318 USD
View
Price under review
19 more retailers have this diamond
Prices start from $8,105 AUDSave up to $1,391 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
$8,105 AUD