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Radiant|Lab Grown|IGI

1.21ct F SI1 Radiant Lab Grown Diamond

GD • F/SI1 • IGI LG617442507

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

Certificate IGI LG617442507

Diamond specifications and retailer prices

From $148 USD
As of October 27, 2026
Save $1,272 USD (90%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $1,420 USD at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG617442507 or 617442507. Listed at 10 retailers as of October 27, 2026, with prices from $148 to $1,420, a $1,272 spread on the same certified stone. Do Amore Diamonds lists it at $1,420. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
F
Color
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.3°
Pavilion angle34°
OriginLab Grown
Grading LabIGI
CertificateIGI LG617442507
Dimensions7.44 × 5.24 × 3.51 mm
L/W Ratio1.42
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.44 mm5.24 mm1.21 ctF / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG617442507
Side View
Table 63.0%Crown 46.3°Girdle: MED-STKPavilion 34°Culet: NoneDepth 67.0%

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 27
Current: $1,420 USD|Low: $118 USD|High: $1,490 USD|Avg: $631 USD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 29, 2026
Retailer 7$148 USD
Retailer 10$166 USD
Retailer 8$337 USD
Retailer 12$349 USD
Retailer 4$476 USD
Retailer 11$479 USD
Retailer 13$484 USD
Retailer 5$500 USD
Retailer 6$623 USD
Retailer 3$810 USD
Retailer 2$951 USD
Retailer 9$1,200 USD
Do Amore Diamonds$1,420 USD

13 data points across 13 retailers

10 retailers$148 USD to $1,420 USD

A
Cheapest Retailer
-
$148 USD
A
Retailer 2
-
$166 USD
View
Final sale: no returns
A
Retailer 3
-
$172 USD
View
B
Retailer 4
-
$337 USD
View
Retailer 5
-
$623 USD
View
Price last confirmed 8 days ago
B
Retailer 6
-
$651 USD
View
B
Retailer 7
-
$810 USD
View
B
Retailer 8
-
$951 USD
£749 GBP
View
C
Retailer 9
-
$1,200 USD
View
Most Expensive
C
Do Amore Diamonds
27-1F01A9E24 · Oct 29
$1,420 USD
View
9 more retailers have this diamond
Prices start from $148 USDSave up to $1,272 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
$148 USD