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Round|Natural|IGI

1.33ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 685580930

Shape and cutting style on the report: Round brilliant

Certificate IGI 685580930

Diamond specifications and retailer prices

From $2,073 AUD
As of November 6, 2026
Save $2,568 AUD (55%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $6,575 AUD at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.33ct natural round diamond

This 1.33ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 685580930. Listed at 25 retailers as of November 2, 2026, with a 124% 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

1.33
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 685580930
Dimensions6.96 × 6.93 × 4.40 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Top View
6.96 mm6.93 mm1.33 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 685580930
Side View
Table 58.0%Crown 36.4°Girdle: ThickPavilion 41.1°Culet: NoneDepth 63.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $2,073 AUD|Low: $2,073 AUD|High: $5,518 AUD|Avg: $3,066 AUD|-0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 1$2,073 AUD
Retailer 3$2,364 AUD
Retailer 12$2,416 AUD
Retailer 13$2,457 AUD
Retailer 4$2,650 AUD
Retailer 11$2,721 AUD
Retailer 2$2,746 AUD
Retailer 5$2,893 AUD
Retailer 6$2,910 AUD
Retailer 7$3,074 AUD
Retailer 8$3,234 AUD
Retailer 9$3,524 AUD
Retailer 10$4,641 AUD

26 data points across 13 retailers

25 retailers$2,073 AUD to $4,641 AUD

A
Cheapest Retailer
-
$2,073 AUD
Retailer 2
-
$2,364 AUD
View
Price last confirmed 12 days ago
A
Retailer 3
-
$2,416 AUD
View
Retailer 4
-
$2,551 AUD
View
Price last confirmed 12 days ago
Retailer 5
-
$2,650 AUD
View
Price last confirmed 8 days ago
Retailer 6
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$2,650 AUD
View
Price last confirmed 15 days ago
A
Retailer 7
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$2,650 AUD
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Retailer 8
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$2,668 AUD
View
Price last confirmed 12 days ago
A
Retailer 9
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$2,721 AUD
View
Retailer 10
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$2,746 AUD
View
Price last confirmed 11 days ago
A
Retailer 11
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$2,773 AUD
View
A
Retailer 12
-
$2,910 AUD
View
Retailer 13
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$3,013 AUD
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Price last confirmed 29 days ago
Retailer 14
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$3,013 AUD
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Price last confirmed 25 days ago
A
Retailer 15
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$3,074 AUD
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Retailer 16
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$3,146 AUD
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Price last confirmed 50 days ago
A
Retailer 17
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$3,234 AUD
View
Retailer 18
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$3,477 AUD
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Price last confirmed 33 days ago
A
Retailer 19
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$3,524 AUD
View
Retailer 20
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$3,630 AUD
View
Price last confirmed 45 days ago
B
Retailer 21
-
$4,641 AUD
View
Retailer 22
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$6,300 AUD
View
Price last confirmed 34 days ago
Retailer 23
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$6,300 AUD
View
Price last confirmed 26 days ago
Retailer 24
-
$6,464 AUD
View
Price last confirmed 14 days ago
Most Expensive
NZ Jewellers
7280adbb-83f0-4888-86d9-acae6ef833e4 · Sep 19
$6,575 AUD
$4,603 USD
View
Price last confirmed 47 days ago
24 more retailers have this diamond
Prices start from $2,073 AUDSave up to $2,568 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
1.33ct Round
$2,073 AUD