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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 $315 NZD
As of November 5, 2026
Save $1,676 NZD (84%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $1,990 NZD 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 $315 to $1,990, a $1,676 spread on the same certified stone. Reve Diamonds lists it at $1,990. 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: $765 NZD|Low: $302 NZD|High: $1,843 NZD|Avg: $818 NZD|-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$315 NZD
Retailer 8$350 NZD
Retailer 3$390 NZD
Retailer 11$525 NZD
Retailer 5$690 NZD
Retailer 4$720 NZD
Retailer 1$765 NZD
Retailer 6$863 NZD
Retailer 7$1,324 NZD
Retailer 2$1,334 NZD
Retailer 9$1,829 NZD

40 data points across 11 retailers

20 retailers$315 NZD to $1,990 NZD

A
Cheapest Retailer
-
$315 NZD
A
Retailer 2
-
$350 NZD
View
Final sale: no returns
A
Retailer 3
-
$365 NZD
View
A
Retailer 4
-
$390 NZD
View
Retailer 5
-
$390 NZD
View
Price last confirmed 12 days ago
A
Retailer 6
-
$432 NZD
View
B+
Retailer 7
-
$525 NZD
View
A
Retailer 8
-
$690 NZD
View
B+
Retailer 9
-
$696 NZD
View
B+
Retailer 10
-
$720 NZD
View
B+
Retailer 11
-
$765 NZD
View
B+
Retailer 12
-
$863 NZD
View
B+
Retailer 13
-
$991 NZD
View
B
Retailer 14
-
$1,252 NZD
View
B
Retailer 15
-
$1,270 NZD
View
B
Retailer 16
-
$1,324 NZD
View
B
Retailer 17
-
$1,334 NZD
View
B
Retailer 18
-
$1,348 NZD
View
Retailer 19
-
$1,829 NZD
View
Price last confirmed 8 days ago
Most Expensive
B
Reve Diamonds
831BFC78D · Nov 6
$1,990 NZD
$1,119 USD
View
19 more retailers have this diamond
Prices start from $315 NZDSave up to $1,676 NZD

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
$315 NZD