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Marquise|Natural|IGI

1.00ct K SI1 Marquise Natural Diamond

GD • K/SI1 • IGI 116423802

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 116423802

Diamond specifications and retailer prices

From $1,661 AUD
As of November 6, 2026
Save $2,410 AUD (59%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $5,699 AUD at NZ Jewellers · As of September 30, 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 standard cut grade and certified by IGI 116423802. Listed at 16 retailers as of November 6, 2026, with a 145% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
K
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishGood
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabIGI
CertificateIGI 116423802
Dimensions9.61 × 5.35 × 3.01 mm
L/W Ratio1.80
Girdle conditionFaceted
Culet sizePointed
Top View
9.61 mm5.35 mm1.00 ctK / SI1
OriginNatural
CutGood
PolishGood
SymmetryGood
FluorescenceNone
CertificateIGI 116423802
Side View
Table 68.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 56.3%

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: $4,071 AUD|Low: $1,661 AUD|High: $4,142 AUD|Avg: $2,603 AUD|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 3$1,661 AUD
Retailer 6$2,176 AUD
Retailer 7$2,310 AUD
Retailer 8$2,336 AUD
Retailer 9$2,336 AUD
Retailer 2$2,636 AUD
Retailer 5$2,851 AUD
Retailer 4$3,173 AUD
Retailer 1$4,071 AUD

38 data points across 9 retailers

16 retailers$1,661 AUD to $4,071 AUD

B+
Cheapest Retailer
-
$1,661 AUD
B+
Retailer 2
-
$2,166 AUD
View
B+
Retailer 3
-
$2,169 AUD
View
B+
Retailer 4
-
$2,176 AUD
View
B+
Retailer 5
-
$2,310 AUD
View
Retailer 6
-
$2,336 AUD
View
Price last confirmed 9 days ago
Retailer 7
-
$2,336 AUD
View
Price last confirmed 40 days ago
B+
Retailer 8
-
$2,336 AUD
View
B+
Retailer 9
-
$2,445 AUD
View
B+
Retailer 10
-
$2,534 AUD
View
B+
Retailer 11
-
$2,636 AUD
View
Retailer 12
-
$2,695 AUD
View
Price last confirmed 39 days ago
B+
Retailer 13
-
$2,851 AUD
View
B
Retailer 14
-
$3,173 AUD
View
B
Retailer 15
-
$4,071 AUD
View
Most Expensive
NZ Jewellers
732e013f-4f37-4dee-886c-c5643a8a5f70 · Sep 30
$5,699 AUD
$3,916 USD
View
Price last confirmed 37 days ago
15 more retailers have this diamond
Prices start from $1,661 AUDSave up to $2,410 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
$1,661 AUD