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Round|Natural|IGI

1.55ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 668457801

Shape and cutting style on the report: Round brilliant

Certificate IGI 668457801

Diamond specifications and retailer prices

From $4,823 AUD
$3,388 USD
As of October 30, 2026
Save $4,644 AUD (49%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $9,467 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 668457801. Listed at 13 retailers as of October 30, 2026, with prices from $4,823 to $9,467, a $4,644 spread on the same certified stone. NZ Jewellers lists it at $9,467. 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
FluorescenceFaint
Crown angle33.4°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 668457801
Dimensions7.45 × 7.52 × 4.49 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.45 mm7.52 mm1.55 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 668457801
Side View
Table 58.0%Crown 33.4°Girdle: THN-STKPavilion 40.8°Culet: NoneDepth 59.9%

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 30
Current: $9,467 AUD|Low: $4,597 AUD|High: $9,467 AUD|Avg: $6,117 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 1, 2026
Retailer 11$4,705 AUD
Retailer 13$4,823 AUD
Retailer 5$4,856 AUD
Retailer 12$5,015 AUD
Retailer 4$5,434 AUD
Retailer 15$5,434 AUD
Retailer 7$5,642 AUD
Retailer 14$5,643 AUD
Retailer 2$5,878 AUD
Retailer 10$6,265 AUD
Retailer 3$6,270 AUD
Retailer 9$6,335 AUD
Retailer 6$6,466 AUD
Retailer 8$9,087 AUD
NZ Jewellers$9,467 AUD

40 data points across 15 retailers

13 retailers$4,823 AUD to $9,467 AUD

Retailer 1
-
$4,705 AUD
$3,305 USD
Price last confirmed 14 days ago
A
Retailer 2
-
$4,823 AUD
$3,388 USD
View
A
Retailer 3
-
$5,015 AUD
$3,523 USD
View
Final sale: no returns
A
Retailer 4
-
$5,434 AUD
$3,817 USD
View
A
Retailer 5
-
$5,434 AUD
$3,817 USD
View
A
Retailer 6
-
$5,642 AUD
$3,963 USD
View
A
Retailer 7
-
$5,643 AUD
$3,964 USD
View
A
Retailer 8
-
$5,878 AUD
£3,251 GBP
View
A
Retailer 9
-
$6,265 AUD
£3,465 GBP
View
B+
Retailer 10
-
$6,270 AUD
$4,404 USD
View
A
Retailer 11
-
$6,335 AUD
€4,238 EUR
View
B+
Retailer 12
-
$9,087 AUD
£5,026 GBP
View
Most Expensive
B
NZ Jewellers
e9cd51c0-6bd9-4603-b3f2-4a85b77b4a21 · Oct 30
$9,467 AUD
$6,650 USD
View
12 more retailers have this diamond
Prices start from $4,823 AUDSave up to $4,644 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
$4,823 AUD