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Marquise|Natural|GIA

1.20ct K SI2 Marquise Natural Diamond

EX • K/SI2

Diamond specifications and retailer prices

From $3,278 AUD
As of November 6, 2026
Save $5,430 AUD (62%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $8,708 AUD at NZ Jewellers · As of October 21, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 14 retailers as of November 5, 2026, with a 166% 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
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions9.88 × 5.42 × 3.67 mm
L/W Ratio1.82
Top View
9.88 mm5.42 mm1.20 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 57.0%CrownGirdle: ThickPavilionCulet: NoneDepth 67.7%

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 6
Current: $8,708 AUD|Low: $3,260 AUD|High: $8,708 AUD|Avg: $4,422 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 26, 2026
Retailer 9$3,260 AUD
Retailer 10$3,278 AUD
Retailer 2$3,774 AUD
Retailer 4$3,774 AUD
Retailer 6$3,784 AUD
Retailer 8$3,947 AUD
Retailer 3$4,043 AUD
Retailer 7$4,205 AUD
Retailer 5$4,353 AUD
NZ Jewellers$8,708 AUD

9 data points across 10 retailers

14 retailers$3,278 AUD to $8,708 AUD

Retailer 1
-
$3,260 AUD
Price last confirmed 16 days ago
B+
Retailer 2
-
$3,278 AUD
View
Retailer 3
-
$3,774 AUD
View
Price last confirmed 8 days ago
Retailer 4
-
$3,774 AUD
View
Price last confirmed 15 days ago
B+
Retailer 5
-
$3,774 AUD
View
B+
Retailer 6
-
$3,784 AUD
View
B+
Retailer 7
-
$3,947 AUD
View
B
Retailer 8
-
$4,043 AUD
View
Retailer 9
-
$4,043 AUD
View
Price last confirmed 15 days ago
B
Retailer 10
-
$4,205 AUD
View
B
Retailer 11
-
$4,353 AUD
View
Retailer 12
-
$4,353 AUD
View
Price last confirmed 16 days ago
C
Retailer 13
-
$8,708 AUD
View
Most Expensive
NZ Jewellers
30410b4d-316e-480d-9828-bf820fcc16cf · Oct 21
$8,708 AUD
$5,983 USD
View
Price last confirmed 16 days ago
13 more retailers have this diamond
Prices start from $3,278 AUDSave up to $5,430 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
$3,278 AUD