Marquise|Natural|GIA

1.20ct H SI1 Marquise Natural Diamond

ID • H/SI1 • GIA 2557359146

Certificate GIA 2557359146

Diamond specifications and retailer prices

From $5,569 USD
As of November 5, 2026
Save $956 USD (15%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $10,318 USD 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 19 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
Color
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: $10,318 USD|Low: $4,874 USD|High: $10,318 USD|Avg: $6,192 USD
NZ Jewellers
Retailer 2
Retailer 3
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Retailer 22
October 27, 2026
Retailer 6$4,874 USD
Retailer 5$4,911 USD
Retailer 3$4,915 USD
Retailer 14$5,020 USD
Retailer 20$5,202 USD
Retailer 21$5,230 USD
Retailer 11$5,521 USD
Retailer 8$5,569 USD
Retailer 17$5,589 USD
Retailer 19$5,589 USD
Retailer 22$5,589 USD
Retailer 15$5,814 USD
Retailer 9$5,873 USD
Retailer 13$5,882 USD
Retailer 18$6,024 USD
Retailer 10$6,525 USD
Retailer 16$6,705 USD
Retailer 12$6,804 USD
Retailer 2$7,512 USD
Retailer 7$9,028 USD
Retailer 4$9,100 USD
NZ Jewellers$10,318 USD

8 data points across 22 retailers

19 retailers$5,569 USD to $6,525 USD

Retailer 1
-
$4,874 USD
Price last confirmed 11 days ago
Retailer 2
-
$4,911 USD
View
Price last confirmed 11 days ago
Retailer 3
-
$4,915 USD
View
Price last confirmed 12 days ago
Retailer 4
-
$5,202 USD
View
Price last confirmed 12 days ago
Retailer 5
-
$5,230 USD
View
Price last confirmed 10 days ago
Retailer 6
-
$5,521 USD
View
Price last confirmed 12 days ago
B
Retailer 7
-
$5,569 USD
View
Retailer 8
-
$5,589 USD
View
Price last confirmed 11 days ago
Retailer 9
-
$5,589 USD
View
Price last confirmed 12 days ago
Retailer 10
-
$5,589 USD
View
Price last confirmed 12 days ago
B
Retailer 11
-
$5,873 USD
View
Retailer 12
-
$5,882 USD
View
Price last confirmed 10 days ago
B
Retailer 13
-
$6,525 USD
View
Retailer 14
-
$6,705 USD
View
Price last confirmed 11 days ago
Retailer 15
-
$6,804 USD
View
Price last confirmed 28 days ago
Retailer 16
-
$7,512 USD
View
Price last confirmed 10 days ago
Retailer 17
-
$9,028 USD
View
Price last confirmed 14 days ago
Retailer 18
-
$9,100 USD
View
Price last confirmed 11 days ago
Most Expensive
NZ Jewellers
1844168c-8e69-4a0c-b643-6b09d37bb58f · Oct 24
$10,318 USD
View
Price under review
18 more retailers have this diamond
Prices start from $5,569 USDSave up to $956 USD

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
$5,569 USD