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Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 5241088647

Certificate GIA 5241088647

Diamond specifications and retailer prices

From $6,300 AUD
As of November 5, 2026
Save $6,365 AUD (50%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $12,665 AUD at MOH London · As of November 4, 2026
View at MOH London

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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5241088647. Listed at 13 retailers as of November 4, 2026, with prices from $6,300 to $12,665, a $6,365 spread on the same certified stone. MOH London lists it at $12,665. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5241088647
Dimensions10.42 × 5.34 × 3.39 mm
L/W Ratio1.95
Girdle conditionFaceted
Culet sizeNone
Top View
10.42 mm5.34 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5241088647
Side View
Table 61.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 63.5%

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 5
Current: $12,665 AUD|Low: $6,300 AUD|High: $12,665 AUD|Avg: $8,154 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 7, 2026
Retailer 11$6,300 AUD
Retailer 12$6,722 AUD
Retailer 10$6,797 AUD
Retailer 9$7,602 AUD
Retailer 13$7,645 AUD
Retailer 2$7,702 AUD
Retailer 6$7,734 AUD
Retailer 7$7,743 AUD
Retailer 3$8,092 AUD
Retailer 4$8,092 AUD
Retailer 5$8,369 AUD
Retailer 8$9,728 AUD
MOH London$12,665 AUD

4 data points across 13 retailers

13 retailers$6,300 AUD to $12,665 AUD

B+
Cheapest Retailer
-
$6,300 AUD
B+
Retailer 2
-
$6,722 AUD
View
B
Retailer 3
-
$6,797 AUD
View
B
Retailer 4
-
$7,602 AUD
View
B
Retailer 5
-
$7,645 AUD
View
B
Retailer 6
-
$7,702 AUD
View
B
Retailer 7
-
$7,734 AUD
View
B
Retailer 8
-
$7,743 AUD
View
B
Retailer 9
-
$8,092 AUD
View
B
Retailer 10
-
$8,092 AUD
View
B
Retailer 11
-
$8,369 AUD
View
B
Retailer 12
-
$9,728 AUD
View
Most Expensive
B
MOH London
BE1C044CB · Nov 4
$12,665 AUD
£6,852 GBP
View
12 more retailers have this diamond
Prices start from $6,300 AUDSave up to $6,365 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
$6,300 AUD