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Round|Lab Grown|IGI

1.23ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG799634541

Shape and cutting style on the report: Round brilliant

Certificate IGI LG799634541

Diamond specifications and retailer prices

From $253 AUD
As of November 5, 2026
Save $1,345 AUD (84%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $1,598 AUD at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.23ct lab-grown round diamond

This 1.23ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG799634541 or 799634541. Listed at 20 retailers as of November 5, 2026, with prices from $253 to $1,598, a $1,345 spread on the same certified stone. Reve Diamonds lists it at $1,598. 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

1.23
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799634541
Dimensions6.86 × 6.84 × 4.26 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.86 mm6.84 mm1.23 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799634541
Side View
Table 56.0%Crown 35.1°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 62.2%

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: Nov 5
Current: $614 AUD|Low: $243 AUD|High: $1,480 AUD|Avg: $657 AUD|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10$253 AUD
Retailer 8$281 AUD
Retailer 3$313 AUD
Retailer 11$421 AUD
Retailer 5$554 AUD
Retailer 4$579 AUD
Retailer 1$614 AUD
Retailer 6$693 AUD
Retailer 7$1,063 AUD
Retailer 2$1,071 AUD
Retailer 9$1,468 AUD

40 data points across 11 retailers

20 retailers$253 AUD to $1,598 AUD

A
Cheapest Retailer
-
$253 AUD
A
Retailer 2
-
$281 AUD
View
Final sale: no returns
A
Retailer 3
-
$293 AUD
View
A
Retailer 4
-
$313 AUD
View
Retailer 5
-
$313 AUD
View
Price last confirmed 12 days ago
A
Retailer 6
-
$347 AUD
View
B+
Retailer 7
-
$421 AUD
View
A
Retailer 8
-
$554 AUD
View
B+
Retailer 9
-
$559 AUD
View
B+
Retailer 10
-
$579 AUD
View
B+
Retailer 11
-
$614 AUD
View
B+
Retailer 12
-
$693 AUD
View
B+
Retailer 13
-
$796 AUD
View
B
Retailer 14
-
$1,006 AUD
View
B
Retailer 15
-
$1,020 AUD
View
B
Retailer 16
-
$1,063 AUD
View
B
Retailer 17
-
$1,071 AUD
View
B
Retailer 18
-
$1,083 AUD
View
Retailer 19
-
$1,468 AUD
View
Price last confirmed 8 days ago
Most Expensive
B
Reve Diamonds
831BFC78D · Nov 6
$1,598 AUD
$1,119 USD
View
19 more retailers have this diamond
Prices start from $253 AUDSave up to $1,345 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
$253 AUD