Round|Lab Grown|IGI

1.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG812617158

Shape and cutting style on the report: Round brilliant

Certificate IGI LG812617158

Diamond specifications and retailer prices

From $314 USD
As of October 29, 2026
Save $2,706 USD (90%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $3,020 USD at Brilliant Earth · As of October 29, 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG812617158 or 812617158. Listed at 19 retailers as of October 29, 2026, with prices from $314 to $3,020, a $2,706 spread on the same certified stone. Brilliant Earth lists it at $3,020. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG812617158
Dimensions7.42 × 7.47 × 4.45 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.42 mm7.47 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG812617158
Side View
Table 58.0%Crown 32.8°Girdle: MediumPavilion 40.6°Culet: NoneDepth 59.8%

Caratlytics Score

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A+
Exceptional
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 29
Current: $3,020 USD|Low: $312 USD|High: $3,410 USD|Avg: $1,267 USD|-11.4%
Brilliant Earth
Retailer 2
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Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
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Retailer 17
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Retailer 19
October 30, 2026
Retailer 6$314 USD
Retailer 18$365 USD
Retailer 15$545 USD
Retailer 16$550 USD
Retailer 2$553 USD
Retailer 7$635 USD
Retailer 19$648 USD
Retailer 17$758 USD
Retailer 13$766 USD
Retailer 14$999 USD
Retailer 5$1,144 USD
Retailer 9$1,384 USD
Retailer 4$1,576 USD
Retailer 12$1,690 USD
Retailer 10$1,723 USD
Retailer 11$1,864 USD
Retailer 8$2,250 USD
Retailer 3$2,790 USD
Brilliant Earth$3,020 USD

38 data points across 19 retailers

19 retailers$314 USD to $3,020 USD

A+
Cheapest Retailer
-
$314 USD
A
Retailer 2
-
$365 USD
View
A
Retailer 3
-
$545 USD
View
A
Retailer 4
-
$550 USD
HK$4,300 HKD
View
A
Retailer 5
-
$553 USD
£435 GBP
View
A
Retailer 6
-
$635 USD
View
A
Retailer 7
-
$648 USD
View
A
Retailer 8
-
$758 USD
View
A
Retailer 9
-
$766 USD
A$1,178 AUD
View
A
Retailer 10
-
$999 USD
A$1,537 AUD
View
B+
Retailer 11
-
$1,144 USD
View
B+
Retailer 12
-
$1,384 USD
View
B+
Retailer 13
-
$1,576 USD
SGD 2,130 SGD
View
B+
Retailer 14
-
$1,690 USD
£1,331 GBP
View
Retailer 15
-
$1,723 USD
A$2,651 AUD
View
Price last confirmed 22 days ago
B
Retailer 16
-
$1,864 USD
CA$2,589 CAD
View
B+
Retailer 17
-
$2,250 USD
View
B
Retailer 18
-
$2,790 USD
View
Most Expensive
B
Brilliant Earth
20445739Y · Oct 29
$3,020 USD
View
18 more retailers have this diamond
Prices start from $314 USDSave up to $2,706 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
$314 USD