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1.55ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 780669607

Shape and cutting style on the report: Round brilliant

Certificate IGI 780669607

Diamond specifications and retailer prices

From $2,794 AUD
SGD 2,652 SGD
As of October 31, 2026
Save $4,610 AUD (62%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $7,404 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.55ct natural round diamond

This 1.55ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 780669607. Listed at 7 retailers as of October 30, 2026, with prices from $2,794 to $7,404, a $4,610 spread on the same certified stone. NZ Jewellers lists it at $7,404. 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

1.55
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.7°
OriginNatural
Grading LabIGI
CertificateIGI 780669607
Dimensions7.39 × 7.44 × 4.62 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
7.39 mm7.44 mm1.55 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 780669607
Side View
Table 58.0%Crown 34°Girdle: MediumPavilion 41.7°Culet: NoneDepth 62.2%

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: Oct 31
Current: $7,404 AUD|Low: $2,771 AUD|High: $8,040 AUD|Avg: $4,805 AUD|-7.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 6$2,794 AUD
Retailer 4$3,542 AUD
Retailer 2$3,831 AUD
Retailer 7$3,864 AUD
Retailer 5$3,864 AUD
Retailer 3$6,205 AUD
NZ Jewellers$7,404 AUD

44 data points across 7 retailers

7 retailers$2,794 AUD to $7,404 AUD

A
Cheapest Retailer
-
$2,794 AUD
SGD 2,652 SGD
A
Retailer 2
-
$3,542 AUD
$2,488 USD
View
A
Retailer 3
-
$3,831 AUD
£2,119 GBP
View
A
Retailer 4
-
$3,864 AUD
$2,714 USD
View
A
Retailer 5
-
$3,864 AUD
$2,714 USD
View
A
Retailer 6
-
$6,205 AUD
£3,432 GBP
View
Most Expensive
B+
NZ Jewellers
15e4c9f3-3229-43cc-95e5-9977e36fde67 · Oct 30
$7,404 AUD
$5,201 USD
View
6 more retailers have this diamond
Prices start from $2,794 AUDSave up to $4,610 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
1.55ct Round
$2,794 AUD