Radiant|Lab Grown|IGI

1.21ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG799677049

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

Certificate IGI LG799677049

Diamond specifications and retailer prices

From $245 USD
As of November 2, 2026
Save $1,094 USD (82%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $1,855 USD at Rare Carat · As of October 18, 2026
View at Rare Carat

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 LG799677049 or 799677049. Listed at 21 retailers as of November 1, 2026, with a 446% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle46.6°
Pavilion angle30.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799677049
Dimensions8.05 × 5.11 × 3.33 mm
L/W Ratio1.58
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
8.05 mm5.11 mm1.21 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799677049
Side View
Table 62.0%Crown 46.6°Girdle: Slightly ThickPavilion 30.7°Culet: NoneDepth 65.2%

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: Nov 2
Current: $1,855 USD|Low: $245 USD|High: $1,885 USD|Avg: $713 USD|-1.6%
Rare Carat
Retailer 2
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Retailer 22
November 2, 2026
Retailer 4$245 USD
Retailer 7$274 USD
Retailer 19$285 USD
Retailer 8$304 USD
Retailer 22$304 USD
Retailer 3$346 USD
Retailer 15$500 USD
Retailer 17$505 USD
Retailer 9$511 USD
Retailer 13$526 USD
Retailer 6$542 USD
Retailer 2$578 USD
Retailer 18$742 USD
Retailer 21$767 USD
Retailer 5$978 USD
Retailer 20$982 USD
Retailer 12$983 USD
Retailer 14$1,030 USD
Retailer 10$1,189 USD
Retailer 16$1,219 USD
Retailer 11$1,339 USD
Rare Carat$1,855 USD

39 data points across 22 retailers

21 retailers$245 USD to $1,339 USD

A
Cheapest Retailer
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$245 USD
A
Retailer 2
-
$274 USD
View
Final sale: no returns
A
Retailer 3
-
$285 USD
View
Retailer 4
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$304 USD
View
Price last confirmed 8 days ago
A
Retailer 5
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$304 USD
View
A
Retailer 6
-
$346 USD
HK$2,700 HKD
View
A
Retailer 7
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$505 USD
€481 EUR
View
A
Retailer 8
-
$511 USD
View
A
Retailer 9
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$526 USD
ZAR 8,490 ZAR
View
A
Retailer 10
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$542 USD
View
A
Retailer 11
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$578 USD
£455 GBP
View
B+
Retailer 12
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$742 USD
A$1,142 AUD
View
B+
Retailer 13
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$767 USD
View
B+
Retailer 14
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$978 USD
View
B+
Retailer 15
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$982 USD
View
B+
Retailer 16
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$983 USD
SGD 1,328 SGD
View
B+
Retailer 17
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$1,030 USD
View
B
Retailer 18
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$1,189 USD
£936 GBP
View
B+
Retailer 19
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$1,219 USD
£960 GBP
View
B
Retailer 20
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$1,339 USD
View
Most Expensive
Rare Carat
A10-142A · Oct 18
$1,855 USD
View
Price last confirmed 14 days ago
20 more retailers have this diamond
Prices start from $245 USDSave up to $1,094 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
$245 USD