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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 €209 EUR
$234 USD
As of October 30, 2026
Save €1,554 EUR (88%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: €1,763 EUR 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 €209 to €1,763, a €1,554 spread on the same certified stone. Brilliant Earth lists it at €1,763. 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

How it works →
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: €1,763 EUR|Low: €201 EUR|High: €2,202 EUR|Avg: €628 EUR|-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€209 EUR
Retailer 8€233 EUR
Retailer 5€243 EUR
Retailer 6€260 EUR
Retailer 16€260 EUR
Retailer 11€431 EUR
Retailer 4€439 EUR
Retailer 2€448 EUR
Retailer 7€474 EUR
Retailer 10€485 EUR
Retailer 12€632 EUR
Retailer 3€833 EUR
Retailer 14€836 EUR
Retailer 9€1,039 EUR
Retailer 13€1,651 EUR
Brilliant Earth€1,763 EUR

43 data points across 16 retailers

21 retailers€209 EUR to €1,763 EUR

A
Cheapest Retailer
-
€209 EUR
$234 USD
A
Retailer 2
-
€233 EUR
$260 USD
View
Final sale: no returns
A
Retailer 3
-
€243 EUR
$271 USD
View
Retailer 4
-
€260 EUR
$290 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
€260 EUR
$290 USD
View
A
Retailer 6
-
€286 EUR
HK$2,500 HKD
View
A
Retailer 7
-
€431 EUR
View
A
Retailer 8
-
€439 EUR
$491 USD
View
A
Retailer 9
-
€448 EUR
ZAR 8,079 ZAR
View
A
Retailer 10
-
€474 EUR
$529 USD
View
A
Retailer 11
-
€485 EUR
£427 GBP
View
A
Retailer 12
-
€632 EUR
A$1,087 AUD
View
B+
Retailer 13
-
€683 EUR
$763 USD
View
B+
Retailer 14
-
€833 EUR
$931 USD
View
B+
Retailer 15
-
€836 EUR
$934 USD
View
B+
Retailer 16
-
€838 EUR
SGD 1,265 SGD
View
B+
Retailer 17
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€880 EUR
$983 USD
View
B+
Retailer 18
-
€1,039 EUR
£914 GBP
View
B
Retailer 19
-
€1,164 EUR
$1,301 USD
View
Retailer 20
-
€1,651 EUR
$1,845 USD
View
Price last confirmed 14 days ago
Most Expensive
B
Brilliant Earth
19340393A · Oct 31
€1,763 EUR
$1,970 USD
View
20 more retailers have this diamond
Prices start from €209 EURSave up to €1,554 EUR

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
€209 EUR