Radiant|Lab Grown|IGI

1.21ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG831632172

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

Certificate IGI LG831632172

Diamond specifications and retailer prices

From $270 USD
As of October 30, 2026
Save $1,271 USD (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,541 USD at Michael Trio · As of October 31, 2026
View at Michael Trio

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 LG831632172 or 831632172. Listed at 14 retailers as of October 30, 2026, with prices from $270 to $1,541, a $1,271 spread on the same certified stone. Michael Trio lists it at $1,541. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle53.9°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831632172
Dimensions8.08 × 5.14 × 3.29 mm
L/W Ratio1.57
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.08 mm5.14 mm1.21 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831632172
Side View
Table 63.0%Crown 53.9°Girdle: MED-STKPavilion 36°Culet: NoneDepth 64.0%

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 30
Current: $1,541 USD|Low: $270 USD|High: $1,564 USD|Avg: $738 USD|-1.5%
Michael Trio
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
October 31, 2026
Retailer 3$270 USD
Retailer 12$307 USD
Retailer 10$400 USD
Retailer 2$476 USD
Retailer 4$513 USD
Retailer 7$559 USD
Retailer 5$731 USD
Retailer 14$765 USD
Retailer 8$960 USD
Retailer 11$1,008 USD
Retailer 9$1,036 USD
Retailer 13$1,165 USD
Retailer 6$1,203 USD
Michael Trio$1,541 USD

21 data points across 14 retailers

14 retailers$270 USD to $1,541 USD

A
Cheapest Retailer
-
$270 USD
Final sale: no returns
A
Retailer 2
-
$307 USD
£242 GBP
View
A
Retailer 3
-
$400 USD
View
A
Retailer 4
-
$476 USD
€453 EUR
View
A
Retailer 5
-
$513 USD
ZAR 8,289 ZAR
View
A
Retailer 6
-
$559 USD
£440 GBP
View
A
Retailer 7
-
$731 USD
A$1,125 AUD
View
B+
Retailer 8
-
$765 USD
View
B+
Retailer 9
-
$960 USD
View
B+
Retailer 10
-
$1,008 USD
View
B+
Retailer 11
-
$1,036 USD
View
B+
Retailer 12
-
$1,165 USD
A$1,793 AUD
View
B+
Retailer 13
-
$1,203 USD
£947 GBP
View
Most Expensive
B
Michael Trio
1699734723 · Oct 31
$1,541 USD
SGD 2,082 SGD
View
13 more retailers have this diamond
Prices start from $270 USDSave up to $1,271 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
$270 USD