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Marquise|Natural|GIA

1.20ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 7551514553

Certificate GIA 7551514553

Diamond specifications and retailer prices

From $4,146 AUD
As of November 5, 2026
Save $4,756 AUD (53%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $8,903 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7551514553. Listed at 14 retailers as of November 5, 2026, with prices from $4,146 to $8,903, a $4,756 spread on the same certified stone. NZ Jewellers lists it at $8,903. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7551514553
Dimensions10.58 × 5.54 × 3.42 mm
L/W Ratio1.91
Girdle conditionFaceted
Culet sizeNone
Top View
10.58 mm5.54 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7551514553
Side View
Table 60.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 61.7%

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: $4,957 AUD|Low: $4,146 AUD|High: $8,648 AUD|Avg: $5,441 AUD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7$4,146 AUD
Retailer 6$4,148 AUD
Retailer 8$4,347 AUD
Retailer 9$4,807 AUD
Retailer 1$4,957 AUD
Retailer 3$5,255 AUD
Retailer 2$5,600 AUD
Retailer 4$6,236 AUD
Retailer 5$8,521 AUD

41 data points across 9 retailers

14 retailers$4,146 AUD to $8,903 AUD

B+
Cheapest Retailer
-
$4,146 AUD
B+
Retailer 2
-
$4,148 AUD
View
B+
Retailer 3
-
$4,347 AUD
View
B
Retailer 4
-
$4,630 AUD
View
Retailer 5
-
$4,630 AUD
View
Price last confirmed 8 days ago
B
Retailer 6
-
$4,807 AUD
View
B+
Retailer 7
-
$4,957 AUD
View
B
Retailer 8
-
$5,255 AUD
View
B
Retailer 9
-
$5,341 AUD
View
B
Retailer 10
-
$5,600 AUD
View
Retailer 11
-
$5,790 AUD
View
Price last confirmed 14 days ago
B
Retailer 12
-
$6,236 AUD
View
B
Retailer 13
-
$8,521 AUD
View
Most Expensive
C
NZ Jewellers
e008bd19-801b-4e79-8965-be14f37f4664 · Nov 5
$8,903 AUD
$6,117 USD
View
13 more retailers have this diamond
Prices start from $4,146 AUDSave up to $4,756 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
$4,146 AUD