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Round|Natural|IGI

1.55ct L SI1 Round Natural Diamond

EX • L/SI1 • IGI 670479391

Shape and cutting style on the report: Round brilliant

Certificate IGI 670479391

Diamond specifications and retailer prices

From $2,780 AUD
As of November 4, 2026
Save $3,656 AUD (57%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $6,435 AUD at NZ Jewellers · As of November 5, 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 L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 670479391. Listed at 11 retailers as of November 4, 2026, with prices from $2,780 to $6,435, a $3,656 spread on the same certified stone. NZ Jewellers lists it at $6,435. 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
L
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle32.9°
Pavilion angle40.6°
OriginNatural
Grading LabIGI
CertificateIGI 670479391
Dimensions7.36 × 7.43 × 4.56 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.36 mm7.43 mm1.55 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 670479391
Side View
Table 55.0%Crown 32.9°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.6%

Caratlytics Score

How it works →
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 4
Current: $6,435 AUD|Low: $2,780 AUD|High: $7,013 AUD|Avg: $3,718 AUD|-1.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 6$2,780 AUD
Retailer 3$2,948 AUD
Retailer 10$3,078 AUD
Retailer 9$3,107 AUD
Retailer 11$3,133 AUD
Retailer 7$3,220 AUD
Retailer 2$3,351 AUD
Retailer 8$3,551 AUD
Retailer 4$3,757 AUD
Retailer 5$3,820 AUD
NZ Jewellers$6,435 AUD

38 data points across 11 retailers

11 retailers$2,780 AUD to $6,435 AUD

A
Cheapest Retailer
-
$2,780 AUD
A
Retailer 2
-
$2,948 AUD
View
A
Retailer 3
-
$3,078 AUD
View
A
Retailer 4
-
$3,107 AUD
View
Retailer 5
-
$3,133 AUD
View
Price last confirmed 8 days ago
A
Retailer 6
-
$3,220 AUD
View
A
Retailer 7
-
$3,351 AUD
View
A
Retailer 8
-
$3,551 AUD
View
A
Retailer 9
-
$3,757 AUD
View
B+
Retailer 10
-
$3,820 AUD
View
Most Expensive
B
NZ Jewellers
7dd6dd44-cec5-4278-a7e2-034ae5b383da · Nov 5
$6,435 AUD
$4,505 USD
View
10 more retailers have this diamond
Prices start from $2,780 AUDSave up to $3,656 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
$2,780 AUD