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Round|Lab Grown|IGI

1.51ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG786640066

Shape and cutting style on the report: Round brilliant

Certificate IGI LG786640066

Diamond specifications and retailer prices

From $429 USD
As of October 29, 2026
Save $2,041 USD (83%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: $3,190 USD at Brilliant Earth · As of October 16, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG786640066 or 786640066. Listed at 26 retailers as of October 29, 2026, with a 476% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786640066
Dimensions7.42 × 7.46 × 4.46 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
7.42 mm7.46 mm1.51 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786640066
Side View
Table 58.0%Crown 33.4°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 59.9%

Caratlytics Score

How it works →
A+
Exceptional
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $2,470 USD|Low: $429 USD|High: $3,200 USD|Avg: $1,154 USD|-22.8%
Brilliant Earth
Retailer 2
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Retailer 22
October 30, 2026
Retailer 3$429 USD
Retailer 13$480 USD
Retailer 22$481 USD
Retailer 7$532 USD
Retailer 8$532 USD
Retailer 21$589 USD
Retailer 19$675 USD
Retailer 9$715 USD
Retailer 17$835 USD
Retailer 6$847 USD
Retailer 16$875 USD
Retailer 18$915 USD
Retailer 15$935 USD
Retailer 5$999 USD
Retailer 2$1,208 USD
Retailer 11$1,692 USD
Retailer 4$1,711 USD
Retailer 14$1,743 USD
Retailer 10$1,925 USD
Retailer 20$1,957 USD
Retailer 12$1,992 USD
Brilliant Earth$2,470 USD

34 data points across 22 retailers

26 retailers$429 USD to $2,470 USD

A+
Cheapest Retailer
-
$429 USD
A
Retailer 2
-
$480 USD
View
Final sale: no returns
A
Retailer 3
-
$481 USD
View
A
Retailer 4
-
$532 USD
View
A
Retailer 5
-
$532 USD
View
A
Retailer 6
-
$589 USD
HK$4,600 HKD
View
A
Retailer 7
-
$675 USD
View
A
Retailer 8
-
$715 USD
View
A
Retailer 9
-
$835 USD
€795 EUR
View
A
Retailer 10
-
$847 USD
View
A
Retailer 11
-
$875 USD
£689 GBP
View
A
Retailer 12
-
$915 USD
ZAR 14,774 ZAR
View
A
Retailer 13
-
$935 USD
A$1,438 AUD
View
A
Retailer 14
-
$999 USD
View
B+
Retailer 15
-
$1,208 USD
View
B+
Retailer 16
-
$1,284 USD
View
B+
Retailer 17
-
$1,692 USD
SGD 2,287 SGD
View
B+
Retailer 18
-
$1,711 USD
View
B+
Retailer 19
-
$1,743 USD
View
B+
Retailer 20
-
$1,774 USD
View
B+
Retailer 21
-
$1,859 USD
View
B+
Retailer 22
-
$1,925 USD
View
B+
Retailer 23
-
$1,957 USD
£1,541 GBP
View
B+
Retailer 24
-
$1,992 USD
View
B
Retailer 25
-
$2,470 USD
View
Most Expensive
Brilliant Earth
18904921A · Oct 16
$3,190 USD
View
Price last confirmed 14 days ago
25 more retailers have this diamond
Prices start from $429 USDSave up to $2,041 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
$429 USD