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Marquise|Natural|GIA

1.20ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 2557877511

Certificate GIA 2557877511

Diamond specifications and retailer prices

From $2,973 USD
As of November 6, 2026
Save $3,980 USD (57%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $6,953 USD at NZ Jewellers · As of November 5, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557877511. Listed at 19 retailers as of November 5, 2026, with prices from $2,973 to $6,953, a $3,980 spread on the same certified stone. NZ Jewellers lists it at $6,953. 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
I
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557877511
Dimensions10.35 × 5.44 × 3.47 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Twinning Wisp, Cavity, Needle
Top View
10.35 mm5.44 mm1.20 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557877511
Side View
Table 59.0%CrownGirdle: THK-VTKPavilionCulet: NDepth 63.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,953 USD|Low: $2,973 USD|High: $6,953 USD|Avg: $4,320 USD
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
November 6, 2026
Retailer 2$2,973 USD
Retailer 13$3,716 USD
Retailer 4$3,790 USD
Retailer 7$3,924 USD
Retailer 3$3,991 USD
Retailer 11$3,991 USD
Retailer 12$3,991 USD
Retailer 9$4,018 USD
Retailer 5$4,070 USD
Retailer 6$4,235 USD
Retailer 8$4,378 USD
Retailer 14$4,605 USD
Retailer 10$6,673 USD
NZ Jewellers$6,953 USD

30 data points across 14 retailers

19 retailers$2,973 USD to $6,953 USD

A
Cheapest Retailer
-
$2,973 USD
B+
Retailer 2
-
$3,172 USD
View
Final sale: no returns
B+
Retailer 3
-
$3,317 USD
View
B+
Retailer 4
-
$3,512 USD
View
B+
Retailer 5
-
$3,716 USD
View
B+
Retailer 6
-
$3,790 USD
View
B+
Retailer 7
-
$3,924 USD
View
B
Retailer 8
-
$3,991 USD
View
B
Retailer 9
-
$3,991 USD
View
Retailer 10
-
$3,991 USD
View
Price last confirmed 8 days ago
B+
Retailer 11
-
$4,018 USD
View
B
Retailer 12
-
$4,070 USD
View
B
Retailer 13
-
$4,137 USD
View
B
Retailer 14
-
$4,235 USD
View
B
Retailer 15
-
$4,250 USD
View
B+
Retailer 16
-
$4,378 USD
View
B
Retailer 17
-
$4,605 USD
View
B
Retailer 18
-
$6,673 USD
View
Most Expensive
C
NZ Jewellers
c2a31624-9175-4791-8f74-0e7976ecf87d · Nov 5
$6,953 USD
View
18 more retailers have this diamond
Prices start from $2,973 USDSave up to $3,980 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.

A
1.20ct Marquise
$2,973 USD