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Marquise|Natural|GIA

1.20ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 2566156667

Certificate GIA 2566156667

Diamond specifications and retailer prices

From $3,554 AUD
As of November 5, 2026
Save $2,678 AUD (43%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,232 AUD at Wholesale Diamonds Direct · As of November 3, 2026
View at Wholesale Diamonds Direct

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 2566156667. Listed at 10 retailers as of November 3, 2026, with prices from $3,554 to $6,232, a $2,678 spread on the same certified stone. Wholesale Diamonds Direct lists it at $6,232. 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
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle37.99°
Pavilion angle37.89°
OriginNatural
Grading LabGIA
CertificateGIA 2566156667
Dimensions10.60 × 5.54 × 3.31 mm
L/W Ratio1.91
Culet sizeNone
Top View
10.60 mm5.54 mm1.20 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2566156667
Side View
Table 61.0%Crown 37.99°Girdle: VTN-THKPavilion 37.89°Culet: NoneDepth 59.8%

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 5
Current: $5,880 AUD|Low: $3,534 AUD|High: $6,609 AUD|Avg: $4,606 AUD|+19.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Wholesale Diamonds Direct
November 6, 2026
Retailer 2$3,554 AUD
Retailer 5$3,774 AUD
Retailer 9$4,074 AUD
Retailer 4$4,145 AUD
Retailer 8$4,180 AUD
Retailer 6$4,541 AUD
Retailer 7$4,657 AUD
Retailer 3$4,814 AUD
Retailer 1$5,880 AUD
Wholesale Diamonds Direct$6,232 AUD

34 data points across 10 retailers

10 retailers$3,554 AUD to $6,232 AUD

A
Cheapest Retailer
-
$3,554 AUD
A
Retailer 2
-
$3,774 AUD
View
B+
Retailer 3
-
$4,074 AUD
View
A
Retailer 4
-
$4,145 AUD
View
A
Retailer 5
-
$4,180 AUD
View
B+
Retailer 6
-
$4,541 AUD
View
B+
Retailer 7
-
$4,657 AUD
View
B+
Retailer 8
-
$4,814 AUD
View
B
Retailer 9
-
$5,880 AUD
View
Most Expensive
B
Wholesale Diamonds Direct
348918947 · Nov 3
$6,232 AUD
$4,282 USD
View
9 more retailers have this diamond
Prices start from $3,554 AUDSave up to $2,678 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.

A
1.20ct Marquise
$3,554 AUD