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Round|Lab Grown|IGI

1.51ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG779621240

Shape and cutting style on the report: Round brilliant

Certificate IGI LG779621240

Diamond specifications and retailer prices

From $220 USD
As of November 5, 2026
Save $1,036 USD (82%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $1,256 USD at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG779621240 or 779621240. Listed at 21 retailers as of November 4, 2026, with prices from $220 to $1,256, a $1,036 spread on the same certified stone. Reve Diamonds lists it at $1,256. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG779621240
Dimensions7.33 × 7.38 × 4.52 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.33 mm7.38 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG779621240
Side View
Table 57.0%Crown 34.7°Girdle: MediumPavilion 40.5°Culet: NoneDepth 61.6%

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 5
Current: $421 USD|Low: $211 USD|High: $1,256 USD|Avg: $596 USD|-1.2%
Retailer 1
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Retailer 18
Reve Diamonds
November 5, 2026
Retailer 17$220 USD
Retailer 9$245 USD
Retailer 3$255 USD
Retailer 2$272 USD
Retailer 7$272 USD
Retailer 5$368 USD
Retailer 1$421 USD
Retailer 13$439 USD
Retailer 4$446 USD
Retailer 11$499 USD
Retailer 8$526 USD
Retailer 16$544 USD
Retailer 15$668 USD
Retailer 12$760 USD
Retailer 6$875 USD
Retailer 10$927 USD
Retailer 18$1,040 USD
Retailer 14$1,090 USD
Reve Diamonds$1,256 USD

43 data points across 19 retailers

21 retailers$220 USD to $1,256 USD

A
Cheapest Retailer
-
$220 USD
A
Retailer 2
-
$245 USD
View
Final sale: no returns
A
Retailer 3
-
$255 USD
View
A
Retailer 4
-
$272 USD
View
Retailer 5
-
$272 USD
View
Price last confirmed 12 days ago
B+
Retailer 6
-
$368 USD
View
A
Retailer 7
-
$421 USD
View
A
Retailer 8
-
$439 USD
View
A
Retailer 9
-
$446 USD
View
A
Retailer 10
-
$499 USD
View
B+
Retailer 11
-
$526 USD
View
B+
Retailer 12
-
$544 USD
View
B+
Retailer 13
-
$668 USD
View
Retailer 14
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$707 USD
View
Price last confirmed 9 days ago
B
Retailer 15
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$760 USD
View
B+
Retailer 16
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$770 USD
View
B
Retailer 17
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$875 USD
View
B
Retailer 18
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$927 USD
View
B
Retailer 19
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$1,040 USD
View
B
Retailer 20
-
$1,090 USD
View
Most Expensive
B
Reve Diamonds
34A7E3B50 · Nov 4
$1,256 USD
View
20 more retailers have this diamond
Prices start from $220 USDSave up to $1,036 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
1.51ct Round
$220 USD