Radiant|Lab Grown|IGI

0.51ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG818661966

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

Certificate IGI LG818661966

Diamond specifications and retailer prices

From $154 USD
As of November 3, 2026
Save $840 USD (85%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $994 USD at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 0.51ct lab-grown radiant diamond

This 0.51ct lab-grown radiant sits in the half to three-quarter carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818661966 or 818661966. Listed at 21 retailers as of November 3, 2026, with prices from $154 to $994, a $840 spread on the same certified stone. Reve Diamonds lists it at $994. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.51
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.1°
Pavilion angle37.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818661966
Dimensions5.67 × 4.03 × 2.79 mm
L/W Ratio1.41
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
5.67 mm4.03 mm0.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818661966
Side View
Table 64.0%Crown 41.1°Girdle: STK-THKPavilion 37.1°Culet: NoneDepth 69.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 3
Current: $287 USD|Low: $154 USD|High: $1,010 USD|Avg: $408 USD|-0.7%
Retailer 1
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
Retailer 17
Reve Diamonds
November 4, 2026
Retailer 4$154 USD
Retailer 5$165 USD
Retailer 7$174 USD
Retailer 6$177 USD
Retailer 8$240 USD
Retailer 1$287 USD
Retailer 13$304 USD
Retailer 11$309 USD
Retailer 9$335 USD
Retailer 16$337 USD
Retailer 15$360 USD
Retailer 10$434 USD
Retailer 2$471 USD
Retailer 17$520 USD
Retailer 14$579 USD
Retailer 3$604 USD
Retailer 12$797 USD
Reve Diamonds$994 USD

35 data points across 18 retailers

21 retailers$154 USD to $994 USD

Retailer 1
-
$138 USD
Price last confirmed 27 days ago
A
Retailer 2
-
$154 USD
View
Final sale: no returns
Retailer 3
-
$165 USD
View
Price last confirmed 39 days ago
Retailer 4
-
$171 USD
View
Price last confirmed 23 days ago
Retailer 5
-
$171 USD
View
Price last confirmed 32 days ago
Retailer 6
-
$174 USD
View
Price last confirmed 40 days ago
A
Retailer 7
-
$240 USD
View
A
Retailer 8
-
$287 USD
View
A
Retailer 9
-
$304 USD
View
A
Retailer 10
-
$309 USD
View
A
Retailer 11
-
$335 USD
View
A
Retailer 12
-
$337 USD
View
Retailer 13
-
$360 USD
View
Price last confirmed 14 days ago
B+
Retailer 14
-
$434 USD
View
B+
Retailer 15
-
$471 USD
View
B+
Retailer 16
-
$520 USD
View
Retailer 17
-
$548 USD
View
Price last confirmed 35 days ago
B
Retailer 18
-
$579 USD
View
B
Retailer 19
-
$604 USD
View
B
Retailer 20
-
$797 USD
View
Most Expensive
B
Reve Diamonds
C24E94FE2 · Nov 4
$994 USD
View
20 more retailers have this diamond
Prices start from $154 USDSave up to $840 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
0.51ct Radiant
$154 USD