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Round|Natural|IGI

2.55ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 828654342

Shape and cutting style on the report: Round brilliant

Certificate IGI 828654342

Diamond specifications and retailer prices

From $9,935 AUD
As of November 5, 2026
Save $12,844 AUD (56%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $22,779 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 2.55ct natural round diamond

This 2.55ct natural round sits in the two to three carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 828654342. Listed at 16 retailers as of November 5, 2026, with prices from $9,935 to $22,779, a $12,844 spread on the same certified stone. NZ Jewellers lists it at $22,779. 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

2.55
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 828654342
Dimensions8.74 × 8.70 × 5.43 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
8.74 mm8.70 mm2.55 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 828654342
Side View
Table 60.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.2%

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 5
Current: $22,779 AUD|Low: $9,935 AUD|High: $23,256 AUD|Avg: $14,330 AUD|-2.1%
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 6, 2026
Retailer 11$9,935 AUD
Retailer 8$11,582 AUD
Retailer 5$11,759 AUD
Retailer 4$12,585 AUD
Retailer 6$12,598 AUD
Retailer 7$12,719 AUD
Retailer 2$13,034 AUD
Retailer 13$13,619 AUD
Retailer 3$13,855 AUD
Retailer 12$14,009 AUD
Retailer 15$14,102 AUD
Retailer 9$15,639 AUD
Retailer 10$15,715 AUD
Retailer 14$18,965 AUD
NZ Jewellers$22,779 AUD

17 data points across 15 retailers

16 retailers$9,935 AUD to $22,779 AUD

A
Cheapest Retailer
-
$9,935 AUD
Retailer 2
-
$10,288 AUD
View
Price last confirmed 23 days ago
A
Retailer 3
-
$11,582 AUD
View
A
Retailer 4
-
$11,759 AUD
View
A
Retailer 5
-
$12,585 AUD
View
A
Retailer 6
-
$12,598 AUD
View
Retailer 7
-
$12,719 AUD
View
Price last confirmed 8 days ago
A
Retailer 8
-
$13,034 AUD
View
A
Retailer 9
-
$13,619 AUD
View
A
Retailer 10
-
$13,855 AUD
View
A
Retailer 11
-
$14,009 AUD
View
A
Retailer 12
-
$14,102 AUD
View
A
Retailer 13
-
$15,639 AUD
View
A
Retailer 14
-
$15,715 AUD
View
B+
Retailer 15
-
$18,965 AUD
View
Most Expensive
B+
NZ Jewellers
41722f61-8fac-4ef7-af22-2433a7809c5f · Nov 5
$22,779 AUD
$15,946 USD
View
15 more retailers have this diamond
Prices start from $9,935 AUDSave up to $12,844 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
2.55ct Round
$9,935 AUD