Radiant|Lab Grown|IGI

1.21ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG784604687

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

Certificate IGI LG784604687

Diamond specifications and retailer prices

From $1,340 USD
As of October 30, 2026
Save $405 USD (23%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,745 USD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 1.21ct lab-grown radiant diamond

This 1.21ct 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 LG784604687 or 784604687. Listed at 2 retailers as of October 30, 2026, with prices from $1,340 to $1,745, a $405 spread on the same certified stone. Blue Nile lists it at $1,745. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.9°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784604687
Dimensions7.66 × 5.37 × 3.52 mm
L/W Ratio1.43
Culet sizePointed
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
7.66 mm5.37 mm1.21 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784604687
Side View
Table 63.0%Crown 41.9°Girdle: MediumPavilion 35.1°Culet: NoneDepth 65.5%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 30
Current: $1,745 USD|Low: $357 USD|High: $4,580 USD|Avg: $1,708 USD
Blue Nile
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September 28, 2026
Retailer 12$357 USD
Retailer 10$640 USD
Retailer 11$840 USD
Retailer 9$1,115 USD
Retailer 8$1,120 USD
Retailer 16$1,140 USD
Retailer 6$1,316 USD
Retailer 2$1,340 USD
Blue Nile$1,745 USD
Retailer 14$1,751 USD
Retailer 15$1,898 USD
Retailer 5$1,901 USD
Retailer 13$2,207 USD
Retailer 4$2,268 USD
Retailer 7$2,943 USD
Retailer 3$4,580 USD

2 data points across 16 retailers

2 retailers$1,340 USD to $1,745 USD

B+
Cheapest Retailer
-
$1,340 USD
Most Expensive
B
Blue Nile
29886102 · Oct 31
$1,745 USD
View
1 more retailer has this diamond
Prices start from $1,340 USDSave up to $405 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.

B+
1.21ct Radiant
$1,340 USD