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Marquise|Natural|GIA

1.20ct D SI1 Marquise Natural Diamond

ID • D/SI1 • GIA 2557626736

Certificate GIA 2557626736

Diamond specifications and retailer prices

From $9,144 AUD
As of November 4, 2026
Save $6,941 AUD (43%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $19,357 AUD 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557626736. Listed at 15 retailers as of November 4, 2026, with a 76% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
D
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle37.35°
Pavilion angle41.78°
OriginNatural
Grading LabGIA
CertificateGIA 2557626736
Dimensions10.77 × 5.47 × 3.53 mm
L/W Ratio1.97
Girdle conditionThick
Culet sizeNone
Key to symbols
Crystal, Feather, Natural
Top View
10.77 mm5.47 mm1.20 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2557626736
Side View
Table 61.0%Crown 37.35°GirdlePavilion 41.78°Culet: NoneDepth 64.6%

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 4
Current: $11,228 AUD|Low: $10,805 AUD|High: $16,324 AUD|Avg: $12,569 AUD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 3$10,806 AUD
Retailer 6$11,160 AUD
Retailer 1$11,228 AUD
Retailer 2$12,575 AUD
Retailer 4$14,119 AUD
Retailer 5$16,085 AUD

37 data points across 6 retailers

15 retailers$9,144 AUD to $16,085 AUD

B+
Cheapest Retailer
-
$9,144 AUD
Retailer 2
-
$9,678 AUD
View
Price last confirmed 8 days ago
B
Retailer 3
-
$9,760 AUD
View
B
Retailer 4
-
$10,485 AUD
View
B
Retailer 5
-
$10,646 AUD
View
B
Retailer 6
-
$10,806 AUD
View
B
Retailer 7
-
$11,097 AUD
View
Retailer 8
-
$11,160 AUD
View
Price last confirmed 15 days ago
B
Retailer 9
-
$11,228 AUD
View
B
Retailer 10
-
$12,099 AUD
View
B
Retailer 11
-
$12,575 AUD
View
Retailer 12
-
$12,749 AUD
View
Price last confirmed 14 days ago
B
Retailer 13
-
$14,119 AUD
View
B
Retailer 14
-
$16,085 AUD
View
Most Expensive
NZ Jewellers
e598eb48-456e-4347-a78a-4cc5790481a2 · Nov 5
$19,357 AUD
$13,300 USD
View
Price under review
14 more retailers have this diamond
Prices start from $9,144 AUDSave up to $6,941 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
$9,144 AUD