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Radiant|Lab Grown|IGI

1.21ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG780696509

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

Certificate IGI LG780696509

Diamond specifications and retailer prices

From $234 USD
As of October 30, 2026
Save $1,736 USD (88%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $1,970 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780696509 or 780696509. Listed at 21 retailers as of October 30, 2026, with prices from $234 to $1,970, a $1,736 spread on the same certified stone. Brilliant Earth lists it at $1,970. 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
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle28°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780696509
Dimensions7.62 × 5.24 × 3.48 mm
L/W Ratio1.45
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
7.62 mm5.24 mm1.21 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780696509
Side View
Table 62.0%Crown 28°Girdle: MediumPavilion 35.5°Culet: NoneDepth 66.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,970 USD|Low: $224 USD|High: $2,460 USD|Avg: $700 USD|-19.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 15$234 USD
Retailer 8$260 USD
Retailer 5$271 USD
Retailer 6$290 USD
Retailer 16$290 USD
Retailer 10$482 USD
Retailer 4$491 USD
Retailer 11$498 USD
Retailer 7$529 USD
Retailer 9$542 USD
Retailer 12$707 USD
Retailer 3$931 USD
Retailer 14$934 USD
Retailer 2$1,161 USD
Retailer 13$1,845 USD
Brilliant Earth$1,970 USD

44 data points across 16 retailers

21 retailers$234 USD to $1,970 USD

A
Cheapest Retailer
-
$234 USD
A
Retailer 2
-
$260 USD
View
Final sale: no returns
A
Retailer 3
-
$271 USD
View
Retailer 4
-
$290 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
$290 USD
View
A
Retailer 6
-
$320 USD
HK$2,500 HKD
View
A
Retailer 7
-
$482 USD
€459 EUR
View
A
Retailer 8
-
$491 USD
View
A
Retailer 9
-
$498 USD
ZAR 8,039 ZAR
View
A
Retailer 10
-
$529 USD
View
A
Retailer 11
-
$542 USD
£427 GBP
View
A
Retailer 12
-
$707 USD
A$1,087 AUD
View
B+
Retailer 13
-
$763 USD
View
B+
Retailer 14
-
$931 USD
View
B+
Retailer 15
-
$934 USD
View
B+
Retailer 16
-
$936 USD
SGD 1,265 SGD
View
B+
Retailer 17
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$983 USD
View
B+
Retailer 18
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$1,161 USD
£914 GBP
View
B
Retailer 19
-
$1,301 USD
View
Retailer 20
-
$1,845 USD
View
Price last confirmed 13 days ago
Most Expensive
B
Brilliant Earth
19340393A · Oct 31
$1,970 USD
View
20 more retailers have this diamond
Prices start from $234 USDSave up to $1,736 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
1.21ct Radiant
$234 USD