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Round|Natural|HRD

1.23ct I SI2 Round Natural Diamond

VG • I/SI2 • HRD 190000166382

Certificate HRD 190000166382

Diamond specifications and retailer prices

From $3,817 AUD
$2,681 USD
As of October 30, 2026
Save $3,350 AUD (47%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $8,910 AUD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.23ct natural round diamond

This 1.23ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by HRD 190000166382. Listed at 9 retailers as of October 29, 2026, with a 88% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.23
Carat
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle37.4°
Pavilion angle40°
OriginNatural
Grading LabHRD
CertificateHRD 190000166382
Dimensions6.74 × 6.81 × 4.19 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.74 mm6.81 mm1.23 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateHRD 190000166382
Side View
Table 60.0%Crown 37.4°Girdle: MediumPavilion 40°Culet: NoneDepth 61.9%

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: $4,706 AUD|Low: $3,279 AUD|High: $7,214 AUD|Avg: $4,607 AUD|+3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 29, 2026
Retailer 3$3,279 AUD
Retailer 4$3,817 AUD
Retailer 5$4,262 AUD
Retailer 6$4,465 AUD
Retailer 1$4,706 AUD
Retailer 2$7,167 AUD

23 data points across 6 retailers

9 retailers$3,817 AUD to $7,167 AUD

A
Cheapest Retailer
-
$3,817 AUD
$2,681 USD
Retailer 2
-
$4,262 AUD
$2,994 USD
View
Price last confirmed 33 days ago
Retailer 3
-
$4,426 AUD
$3,109 USD
View
Price last confirmed 33 days ago
B+
Retailer 4
-
$4,465 AUD
$3,136 USD
View
B+
Retailer 5
-
$4,706 AUD
€3,148 EUR
View
Retailer 6
-
$4,917 AUD
$3,454 USD
View
Price last confirmed 33 days ago
B
Retailer 7
-
$5,268 AUD
€3,524 EUR
View
B
Retailer 8
-
$7,167 AUD
£3,964 GBP
View
Most Expensive
NZ Jewellers
5666e181-3ca3-4e58-ab54-8f4a060c4fc2 · Sep 28
$8,910 AUD
$6,259 USD
View
Price last confirmed 34 days ago
8 more retailers have this diamond
Prices start from $3,817 AUDSave up to $3,350 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
1.23ct Round
$3,817 AUD