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Round|Lab Grown|IGI

1.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG778644701

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778644701

Diamond specifications and retailer prices

From $322 USD
As of October 29, 2026
Save $3,038 USD (90%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $3,360 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 LG778644701 or 778644701. Listed at 23 retailers as of October 29, 2026, with prices from $322 to $3,360, a $3,038 spread on the same certified stone. Brilliant Earth lists it at $3,360. 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 angle34.8°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778644701
Dimensions7.33 × 7.35 × 4.57 mm
L/W Ratio1.00
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 mm7.35 mm1.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778644701
Side View
Table 56.0%Crown 34.8°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.3%

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: Oct 29
Current: $3,360 USD|Low: $322 USD|High: $3,920 USD|Avg: $956 USD|-14.3%
Brilliant Earth
Retailer 2
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Retailer 22
October 30, 2026
Retailer 19$322 USD
Retailer 20$360 USD
Retailer 14$376 USD
Retailer 7$402 USD
Retailer 12$402 USD
Retailer 13$513 USD
Retailer 6$555 USD
Retailer 3$644 USD
Retailer 11$651 USD
Retailer 5$691 USD
Retailer 15$701 USD
Retailer 16$711 USD
Retailer 4$937 USD
Retailer 17$963 USD
Retailer 8$992 USD
Retailer 22$1,279 USD
Retailer 9$1,293 USD
Retailer 18$1,329 USD
Retailer 10$1,430 USD
Retailer 2$1,583 USD
Retailer 21$1,609 USD
Brilliant Earth$3,360 USD

25 data points across 22 retailers

23 retailers$322 USD to $3,360 USD

A
Cheapest Retailer
-
$322 USD
A
Retailer 2
-
$360 USD
View
Final sale: no returns
A
Retailer 3
-
$376 USD
View
A
Retailer 4
-
$402 USD
View
A
Retailer 5
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$402 USD
View
A
Retailer 6
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$513 USD
£404 GBP
View
A
Retailer 7
-
$555 USD
View
A
Retailer 8
-
$644 USD
€613 EUR
View
A
Retailer 9
-
$651 USD
View
A
Retailer 10
-
$691 USD
ZAR 11,164 ZAR
View
A
Retailer 11
-
$701 USD
A$1,078 AUD
View
A
Retailer 12
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$711 USD
£560 GBP
View
A
Retailer 13
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$937 USD
A$1,442 AUD
View
A
Retailer 14
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$963 USD
View
B+
Retailer 15
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$992 USD
View
B+
Retailer 16
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$1,279 USD
SGD 1,729 SGD
View
B+
Retailer 17
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$1,293 USD
View
B+
Retailer 18
-
$1,329 USD
View
B+
Retailer 19
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$1,430 USD
View
B+
Retailer 20
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$1,583 USD
View
B+
Retailer 21
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$1,609 USD
£1,267 GBP
View
Retailer 22
-
$1,716 USD
A$2,640 AUD
View
Price last confirmed 29 days ago
Most Expensive
B
Brilliant Earth
21000796A · Oct 29
$3,360 USD
View
22 more retailers have this diamond
Prices start from $322 USDSave up to $3,038 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
$322 USD