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Marquise|Natural|GIA

1.20ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 2556611130

Certificate GIA 2556611130

Diamond specifications and retailer prices

From $5,245 AUD
$3,676 USD
As of October 30, 2026
Save $6,217 AUD (54%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $11,462 AUD at NZ Jewellers · As of October 30, 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 J 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 2556611130. Listed at 21 retailers as of October 30, 2026, with prices from $5,245 to $11,462, a $6,217 spread on the same certified stone. NZ Jewellers lists it at $11,462. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556611130
Dimensions10.54 × 5.57 × 3.52 mm
L/W Ratio1.89
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Indented Natural
Top View
10.54 mm5.57 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556611130
Side View
Table 61.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 63.3%

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: Oct 30
Current: $11,462 AUD|Low: $4,042 AUD|High: $11,462 AUD|Avg: $6,031 AUD|+17.1%
NZ Jewellers
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Retailer 28
October 30, 2026
Retailer 20$4,042 AUD
Retailer 16$4,262 AUD
Retailer 22$5,245 AUD
Retailer 2$5,327 AUD
Retailer 28$5,598 AUD
Retailer 5$5,665 AUD
Retailer 15$5,928 AUD
Retailer 23$5,936 AUD
Retailer 4$5,960 AUD
Retailer 6$5,960 AUD
Retailer 10$5,960 AUD
Retailer 21$5,979 AUD
Retailer 24$6,024 AUD
Retailer 14$6,045 AUD
Retailer 7$6,253 AUD
Retailer 8$6,325 AUD
Retailer 26$6,437 AUD
Retailer 19$6,457 AUD
Retailer 27$6,542 AUD
Retailer 11$6,721 AUD
Retailer 13$6,721 AUD
Retailer 17$6,731 AUD
Retailer 3$6,873 AUD
Retailer 25$6,935 AUD
Retailer 12$6,948 AUD
Retailer 9$7,440 AUD
Retailer 18$9,458 AUD
NZ Jewellers$11,462 AUD

13 data points across 28 retailers

21 retailers$5,245 AUD to $11,462 AUD

B+
Cheapest Retailer
-
$5,245 AUD
$3,676 USD
B
Retailer 2
-
$5,327 AUD
$3,733 USD
View
B
Retailer 3
-
$5,598 AUD
$3,923 USD
View
B
Retailer 4
-
$5,665 AUD
$3,970 USD
View
Retailer 5
-
$5,928 AUD
View
Price last confirmed 36 days ago
B
Retailer 6
-
$5,936 AUD
$4,160 USD
View
B
Retailer 7
-
$5,960 AUD
$4,177 USD
View
B
Retailer 8
-
$5,960 AUD
$4,177 USD
View
B
Retailer 9
-
$6,024 AUD
CA$5,863 CAD
View
B
Retailer 10
-
$6,253 AUD
$4,382 USD
View
B
Retailer 11
-
$6,325 AUD
$4,433 USD
View
B
Retailer 12
-
$6,437 AUD
£3,552 GBP
View
Retailer 13
-
$6,457 AUD
$4,525 USD
View
Price last confirmed 40 days ago
B
Retailer 14
-
$6,542 AUD
£3,610 GBP
View
B
Retailer 15
-
$6,696 AUD
$4,693 USD
View
B
Retailer 16
-
$6,721 AUD
$4,710 USD
View
B
Retailer 17
-
$6,721 AUD
$4,710 USD
View
B
Retailer 18
-
$6,873 AUD
$4,817 USD
View
B
Retailer 19
-
$6,935 AUD
$4,860 USD
View
B
Retailer 20
-
$6,948 AUD
$4,869 USD
View
Most Expensive
B
NZ Jewellers
37847300-0b2d-4569-b8cc-9f53c7a5744a · Oct 30
$11,462 AUD
$8,033 USD
View
20 more retailers have this diamond
Prices start from $5,245 AUDSave up to $6,217 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
$5,245 AUD