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Marquise|Natural|IGI

1.00ct I SI2 Marquise Natural Diamond

VG • I/SI2 • IGI 803629089

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 803629089

Diamond specifications and retailer prices

From $2,035 AUD
As of November 6, 2026
Save $1,925 AUD (49%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $5,682 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 803629089. Listed at 17 retailers as of November 2, 2026, with a 95% 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
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle38.5°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 803629089
Dimensions9.94 × 5.23 × 3.23 mm
L/W Ratio1.90
Girdle conditionFaceted
Top View
9.94 mm5.23 mm1.00 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 803629089
Side View
Table 68.0%Crown 38.5°Girdle: MED-THKPavilion 40.9°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 6
Current: $2,035 AUD|Low: $1,971 AUD|High: $4,130 AUD|Avg: $2,618 AUD|+3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 1$2,035 AUD
Retailer 4$2,043 AUD
Retailer 8$2,313 AUD
Retailer 10$2,330 AUD
Retailer 9$2,364 AUD
Retailer 11$2,391 AUD
Retailer 5$2,403 AUD
Retailer 2$2,688 AUD
Retailer 3$2,771 AUD
Retailer 6$3,088 AUD
Retailer 7$3,960 AUD

26 data points across 11 retailers

17 retailers$2,035 AUD to $3,960 AUD

A
Cheapest Retailer
-
$2,035 AUD
Final sale: no returns
A
Retailer 2
-
$2,043 AUD
View
B+
Retailer 3
-
$2,313 AUD
View
Retailer 4
-
$2,330 AUD
View
Price last confirmed 53 days ago
Retailer 5
-
$2,330 AUD
View
Price last confirmed 36 days ago
Retailer 6
-
$2,330 AUD
View
Price last confirmed 21 days ago
B+
Retailer 7
-
$2,364 AUD
View
B+
Retailer 8
-
$2,391 AUD
View
A
Retailer 9
-
$2,403 AUD
View
Retailer 10
-
$2,438 AUD
View
Price last confirmed 36 days ago
Retailer 11
-
$2,688 AUD
View
Price last confirmed 61 days ago
Retailer 12
-
$2,688 AUD
View
Price last confirmed 38 days ago
Retailer 13
-
$2,688 AUD
View
Price last confirmed 52 days ago
B+
Retailer 14
-
$3,088 AUD
View
B+
Retailer 15
-
$3,960 AUD
View
Retailer 16
-
$5,682 AUD
View
Price last confirmed 49 days ago
Most Expensive
NZ Jewellers
1a3dd88f-90c5-436a-9a72-1b621883f483 · Sep 30
$5,682 AUD
$3,904 USD
View
Price last confirmed 37 days ago
16 more retailers have this diamond
Prices start from $2,035 AUDSave up to $1,925 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
1.00ct Marquise
$2,035 AUD