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Marquise|Natural|GIA

1.20ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 6542707387

Certificate GIA 6542707387

Diamond specifications and retailer prices

From $3,353 AUD
As of November 5, 2026
Save $5,210 AUD (61%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $8,564 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 6542707387. Listed at 14 retailers as of November 5, 2026, with prices from $3,353 to $8,564, a $5,210 spread on the same certified stone. NZ Jewellers lists it at $8,564. 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
SymmetryExcellent
FluorescenceStrong
Crown angle37.15°
Pavilion angle39.09°
OriginNatural
Grading LabGIA
CertificateGIA 6542707387
Dimensions10.60 × 5.57 × 3.44 mm
L/W Ratio1.90
Top View
10.60 mm5.57 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6542707387
Side View
Table 58.0%Crown 37.15°Girdle: STK-THKPavilion 39.09°Culet: NoneDepth 61.8%

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: $8,564 AUD|Low: $3,353 AUD|High: $8,564 AUD|Avg: $4,615 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 6$3,353 AUD
Retailer 14$3,675 AUD
Retailer 3$3,711 AUD
Retailer 4$3,711 AUD
Retailer 12$3,883 AUD
Retailer 2$3,973 AUD
Retailer 9$4,116 AUD
Retailer 5$4,148 AUD
Retailer 13$4,282 AUD
Retailer 8$4,309 AUD
Retailer 7$4,768 AUD
Retailer 10$4,999 AUD
Retailer 11$7,156 AUD
NZ Jewellers$8,564 AUD

29 data points across 14 retailers

14 retailers$3,353 AUD to $8,564 AUD

A
Cheapest Retailer
-
$3,353 AUD
B+
Retailer 2
-
$3,675 AUD
View
Retailer 3
-
$3,711 AUD
View
Price last confirmed 25 days ago
B+
Retailer 4
-
$3,711 AUD
View
B+
Retailer 5
-
$3,883 AUD
View
B+
Retailer 6
-
$3,973 AUD
View
B+
Retailer 7
-
$4,116 AUD
View
B+
Retailer 8
-
$4,148 AUD
View
B+
Retailer 9
-
$4,282 AUD
View
B+
Retailer 10
-
$4,309 AUD
View
B
Retailer 11
-
$4,768 AUD
View
B
Retailer 12
-
$4,999 AUD
View
B
Retailer 13
-
$7,156 AUD
View
Most Expensive
C
NZ Jewellers
fcd1d8e7-efd8-4cc6-a80c-c6ef134f29a9 · Nov 5
$8,564 AUD
$5,884 USD
View
13 more retailers have this diamond
Prices start from $3,353 AUDSave up to $5,210 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
$3,353 AUD