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 $177 USD
As of November 5, 2026
Save $942 USD (84%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $1,119 USD at Reve Diamonds · As of November 4, 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 4, 2026, with prices from $177 to $1,119, a $942 spread on the same certified stone. Reve Diamonds lists it at $1,119. 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
Color
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
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Price History

Last verified: Nov 5
Current: $429 USD|Low: $170 USD|High: $1,036 USD|Avg: $459 USD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 10$177 USD
Retailer 8$197 USD
Retailer 3$219 USD
Retailer 11$295 USD
Retailer 4$388 USD
Retailer 7$407 USD
Retailer 1$429 USD
Retailer 5$485 USD
Retailer 6$744 USD
Retailer 2$750 USD
Retailer 9$1,028 USD

40 data points across 11 retailers

20 retailers$177 USD to $1,119 USD

A
Cheapest Retailer
-
$177 USD
A
Retailer 2
-
$197 USD
View
Final sale: no returns
A
Retailer 3
-
$205 USD
View
A
Retailer 4
-
$219 USD
View
Retailer 5
-
$219 USD
View
Price last confirmed 12 days ago
A
Retailer 6
-
$243 USD
View
B+
Retailer 7
-
$295 USD
View
A
Retailer 8
-
$388 USD
View
B+
Retailer 9
-
$391 USD
View
B+
Retailer 10
-
$407 USD
View
B+
Retailer 11
-
$429 USD
View
B+
Retailer 12
-
$485 USD
View
B+
Retailer 13
-
$557 USD
View
B
Retailer 14
-
$704 USD
View
B
Retailer 15
-
$714 USD
View
B
Retailer 16
-
$744 USD
View
B
Retailer 17
-
$750 USD
View
B
Retailer 18
-
$758 USD
View
Retailer 19
-
$1,028 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Reve Diamonds
831BFC78D · Nov 4
$1,119 USD
View
19 more retailers have this diamond
Prices start from $177 USDSave up to $942 USD

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
$177 USD