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Round|Lab Grown|IGI

1.51ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG770669393

Shape and cutting style on the report: Round brilliant

Certificate IGI LG770669393

Diamond specifications and retailer prices

From $223 USD
As of November 5, 2026
Save $997 USD (82%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,220 USD at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

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 LG770669393 or 770669393. Listed at 15 retailers as of November 5, 2026, with prices from $223 to $1,220, a $997 spread on the same certified stone. Brilliant Earth lists it at $1,220. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770669393
Dimensions7.35 × 7.30 × 4.56 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.35 mm7.30 mm1.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770669393
Side View
Table 60.0%Crown 34.8°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.2%

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 5
Current: $1,220 USD|Low: $214 USD|High: $1,220 USD|Avg: $617 USD|+0.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10$223 USD
Retailer 11$276 USD
Retailer 9$370 USD
Retailer 5$427 USD
Retailer 7$465 USD
Retailer 2$507 USD
Retailer 3$604 USD
Retailer 4$755 USD
Retailer 6$765 USD
Retailer 8$1,107 USD
Brilliant Earth$1,220 USD

44 data points across 11 retailers

15 retailers$223 USD to $1,220 USD

A
Cheapest Retailer
-
$223 USD
A
Retailer 2
-
$258 USD
View
Retailer 3
-
$276 USD
View
Price last confirmed 12 days ago
A
Retailer 4
-
$276 USD
View
B+
Retailer 5
-
$370 USD
View
A
Retailer 6
-
$427 USD
View
A
Retailer 7
-
$447 USD
View
A
Retailer 8
-
$465 USD
View
A
Retailer 9
-
$507 USD
View
B+
Retailer 10
-
$604 USD
View
B
Retailer 11
-
$755 USD
View
B+
Retailer 12
-
$765 USD
View
B
Retailer 13
-
$887 USD
View
Retailer 14
-
$1,107 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
20482981A · Nov 5
$1,220 USD
View
14 more retailers have this diamond
Prices start from $223 USDSave up to $997 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
$223 USD