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Marquise|Natural|IGI

1.00ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 807646677

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 807646677

Diamond specifications and retailer prices

From $1,986 AUD
As of November 1, 2026
Save $186 AUD (9%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $5,274 AUD at NZ Jewellers · As of October 27, 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 807646677. Listed at 14 retailers as of November 1, 2026, with a relatively tight 9% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle36.9°
Pavilion angle38.2°
OriginNatural
Grading LabIGI
CertificateIGI 807646677
Dimensions9.18 × 5.25 × 3.40 mm
L/W Ratio1.75
Girdle conditionFaceted
Top View
9.18 mm5.25 mm1.00 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateIGI 807646677
Side View
Table 56.0%Crown 36.9°Girdle: STK-THKPavilion 38.2°Culet: NoneDepth 64.8%

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 1
Current: $2,090 AUD|Low: $1,798 AUD|High: $3,833 AUD|Avg: $2,507 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 8$1,821 AUD
Retailer 9$1,971 AUD
Retailer 10$1,996 AUD
Retailer 1$2,090 AUD
Retailer 6$2,171 AUD
Retailer 11$2,263 AUD
Retailer 7$2,461 AUD
Retailer 3$2,496 AUD
Retailer 5$2,948 AUD
Retailer 2$3,117 AUD
Retailer 4$3,810 AUD

33 data points across 11 retailers

14 retailers$1,986 AUD to $2,171 AUD

Retailer 1
-
$1,821 AUD
Price last confirmed 10 days ago
Retailer 2
-
$1,971 AUD
View
Price last confirmed 7 days ago
A
Retailer 3
-
$1,986 AUD
View
A
Retailer 4
-
$2,090 AUD
View
A
Retailer 5
-
$2,157 AUD
View
Retailer 6
-
$2,163 AUD
View
Price last confirmed 10 days ago
B+
Retailer 7
-
$2,171 AUD
View
Retailer 8
-
$2,263 AUD
View
Price last confirmed 11 days ago
Retailer 9
-
$2,461 AUD
View
Price last confirmed 8 days ago
Retailer 10
-
$2,496 AUD
View
Price last confirmed 9 days ago
Retailer 11
-
$2,948 AUD
View
Price last confirmed 8 days ago
Retailer 12
-
$3,117 AUD
View
Price last confirmed 9 days ago
Retailer 13
-
$3,810 AUD
View
Price last confirmed 7 days ago
Most Expensive
NZ Jewellers
4d1f7614-4d6b-415c-b36a-05c362ee557a · Oct 27
$5,274 AUD
$3,692 USD
View
Price last confirmed 9 days ago
13 more retailers have this diamond
Prices start from $1,986 AUDSave up to $186 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
$1,986 AUD