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Round|Natural|IGI

1.25ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 670479480

Shape and cutting style on the report: Round brilliant

Certificate IGI 670479480

Diamond specifications and retailer prices

From $3,196 AUD
$2,245 USD
As of October 30, 2026
Save $4,200 AUD (57%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $7,396 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.25ct natural round diamond

This 1.25ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 670479480. Listed at 11 retailers as of October 30, 2026, with prices from $3,196 to $7,396, a $4,200 spread on the same certified stone. NZ Jewellers lists it at $7,396. 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

1.25
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41.6°
OriginNatural
Grading LabIGI
CertificateIGI 670479480
Dimensions6.90 × 6.95 × 4.19 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.90 mm6.95 mm1.25 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 670479480
Side View
Table 61.0%Crown 32°Girdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 60.6%

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: $7,396 AUD|Low: $2,202 AUD|High: $7,396 AUD|Avg: $3,983 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
October 30, 2026
Retailer 6$2,202 AUD
Retailer 5$3,196 AUD
Retailer 9$3,266 AUD
Retailer 7$3,286 AUD
Retailer 14$3,365 AUD
Retailer 11$3,538 AUD
Retailer 13$3,538 AUD
Retailer 10$3,701 AUD
Retailer 4$3,737 AUD
Retailer 12$4,081 AUD
Retailer 2$4,147 AUD
Retailer 3$4,209 AUD
Retailer 8$6,059 AUD
NZ Jewellers$7,396 AUD

34 data points across 14 retailers

11 retailers$3,196 AUD to $7,396 AUD

A
Cheapest Retailer
-
$3,196 AUD
$2,245 USD
A
Retailer 2
-
$3,266 AUD
$2,294 USD
View
Final sale: no returns
A
Retailer 3
-
$3,286 AUD
£1,818 GBP
View
A
Retailer 4
-
$3,538 AUD
$2,485 USD
View
A
Retailer 5
-
$3,538 AUD
$2,485 USD
View
A
Retailer 6
-
$3,701 AUD
$2,600 USD
View
A
Retailer 7
-
$3,737 AUD
$2,625 USD
View
A
Retailer 8
-
$4,081 AUD
$2,867 USD
View
A
Retailer 9
-
$4,147 AUD
€2,774 EUR
View
B+
Retailer 10
-
$6,059 AUD
£3,351 GBP
View
Most Expensive
B
NZ Jewellers
847bf1c9-4f0d-461b-afc1-baf01741f4bf · Oct 30
$7,396 AUD
$5,195 USD
View
10 more retailers have this diamond
Prices start from $3,196 AUDSave up to $4,200 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
1.25ct Round
$3,196 AUD