Radiant|Lab Grown|IGI

1.23ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG811638351

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG811638351

Diamond specifications and retailer prices

From $325 USD
£256 GBP
As of November 2, 2026
Save $1,885 USD (85%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $2,380 USD at Rare Carat · As of October 18, 2026
View at Rare Carat

About this 1.23ct lab-grown radiant diamond

This 1.23ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG811638351 or 811638351. Listed at 8 retailers as of November 1, 2026, with a 580% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.8°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811638351
Dimensions7.72 × 5.28 × 3.61 mm
L/W Ratio1.46
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
7.72 mm5.28 mm1.23 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811638351
Side View
Table 67.0%Crown 42.8°Girdle: MediumPavilion 35.6°Culet: NoneDepth 68.4%

Caratlytics Score

How it works →
A+
Exceptional
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 2
Current: $2,380 USD|Low: $261 USD|High: $3,170 USD|Avg: $1,090 USD|+6.8%
Rare Carat
Retailer 2
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November 2, 2026
Retailer 4$261 USD
Retailer 8$294 USD
Retailer 2$325 USD
Retailer 15$475 USD
Retailer 13$484 USD
Retailer 6$741 USD
Retailer 3$758 USD
Retailer 16$804 USD
Retailer 7$833 USD
Retailer 12$922 USD
Retailer 14$1,069 USD
Retailer 9$1,265 USD
Retailer 5$1,514 USD
Retailer 10$1,930 USD
Retailer 11$2,210 USD
Rare Carat$2,380 USD

21 data points across 16 retailers

8 retailers$325 USD to $2,210 USD

A+
Cheapest Retailer
-
$325 USD
£256 GBP
A
Retailer 2
-
$484 USD
View
B+
Retailer 3
-
$922 USD
View
B+
Retailer 4
-
$1,069 USD
View
B+
Retailer 5
-
$1,265 USD
£996 GBP
View
B
Retailer 6
-
$1,930 USD
View
B
Retailer 7
-
$2,210 USD
View
Most Expensive
Rare Carat
PD-223153 · Oct 18
$2,380 USD
View
Price last confirmed 14 days ago
7 more retailers have this diamond
Prices start from $325 USDSave up to $1,885 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 Radiant
$325 USD