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Marquise|Natural|GIA

1.00ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 1375003103

Certificate GIA 1375003103

Diamond specifications and retailer prices

From $3,189 AUD
As of November 6, 2026
Save $5,229 AUD (62%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $8,418 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct 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 1375003103. Listed at 19 retailers as of November 5, 2026, with prices from $3,189 to $8,418, a $5,229 spread on the same certified stone. NZ Jewellers lists it at $8,418. 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

1.00
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1375003103
Dimensions10.03 × 5.08 × 3.32 mm
L/W Ratio1.97
Culet sizeNone
Top View
10.03 mm5.08 mm1.00 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1375003103
Side View
Table 56.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 65.3%

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: Nov 6
Current: $4,248 AUD|Low: $3,189 AUD|High: $7,140 AUD|Avg: $4,471 AUD|+2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 7$3,189 AUD
Retailer 5$3,617 AUD
Retailer 6$3,816 AUD
Retailer 8$4,209 AUD
Retailer 1$4,248 AUD
Retailer 4$4,695 AUD
Retailer 2$4,915 AUD
Retailer 3$7,035 AUD

44 data points across 8 retailers

19 retailers$3,189 AUD to $8,418 AUD

B+
Cheapest Retailer
-
$3,189 AUD
B+
Retailer 2
-
$3,279 AUD
View
B+
Retailer 3
-
$3,295 AUD
View
B+
Retailer 4
-
$3,441 AUD
View
B+
Retailer 5
-
$3,519 AUD
View
B
Retailer 6
-
$3,617 AUD
View
Retailer 7
-
$3,649 AUD
View
Price last confirmed 9 days ago
B
Retailer 8
-
$3,649 AUD
View
B
Retailer 9
-
$3,710 AUD
View
B
Retailer 10
-
$3,816 AUD
View
B
Retailer 11
-
$3,954 AUD
View
B
Retailer 12
-
$3,954 AUD
View
B
Retailer 13
-
$4,209 AUD
View
B
Retailer 14
-
$4,248 AUD
View
B
Retailer 15
-
$4,695 AUD
View
B
Retailer 16
-
$4,915 AUD
View
B
Retailer 17
-
$5,800 AUD
View
B
Retailer 18
-
$7,035 AUD
View
Most Expensive
C
NZ Jewellers
d25ecab8-ce6f-41c4-a648-317ad859a575 · Nov 5
$8,418 AUD
$5,784 USD
View
18 more retailers have this diamond
Prices start from $3,189 AUDSave up to $5,229 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+
1.00ct Marquise
$3,189 AUD