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Marquise|Lab Grown|IGI

1.45ct D FL Marquise Lab Grown Diamond

ID • D/FL • IGI LG780666091

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780666091

Diamond specifications and retailer prices

From $338 USD
As of November 4, 2026
Save $2,662 USD (89%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $3,435 USD at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.45ct lab-grown marquise diamond

This 1.45ct lab-grown marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780666091 or 780666091. Listed at 16 retailers as of November 4, 2026, with a 788% 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

1.45
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780666091
Dimensions11.25 × 6.00 × 3.69 mm
L/W Ratio1.88
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
11.25 mm6.00 mm1.45 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780666091
Side View
Table 60.0%Crown 34.2°Girdle: MED-STKPavilion 40°Culet: NoneDepth 61.5%

Caratlytics Score

How it works →
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 4
Current: $3,435 USD|Low: $338 USD|High: $4,070 USD|Avg: $1,620 USD|+1.5%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 13$338 USD
Retailer 5$392 USD
Retailer 8$514 USD
Retailer 14$582 USD
Retailer 6$620 USD
Retailer 17$675 USD
Retailer 11$782 USD
Retailer 7$870 USD
Retailer 12$986 USD
Retailer 15$1,228 USD
Retailer 4$1,274 USD
Retailer 3$1,486 USD
Retailer 2$1,805 USD
Retailer 10$2,750 USD
Retailer 16$3,000 USD
Rare Carat$3,435 USD
Retailer 9$3,573 USD

31 data points across 17 retailers

16 retailers$338 USD to $3,000 USD

A
Cheapest Retailer
-
$338 USD
A
Retailer 2
-
$392 USD
View
A
Retailer 3
-
$514 USD
View
Final sale: no returns
A
Retailer 4
-
$582 USD
View
A
Retailer 5
-
$620 USD
View
A
Retailer 6
-
$675 USD
View
A
Retailer 7
-
$782 USD
View
A
Retailer 8
-
$870 USD
View
A
Retailer 9
-
$986 USD
View
B+
Retailer 10
-
$1,228 USD
View
B+
Retailer 11
-
$1,274 USD
View
B+
Retailer 12
-
$1,486 USD
View
B+
Retailer 13
-
$1,805 USD
View
B
Retailer 14
-
$2,750 USD
View
B
Retailer 15
-
$3,000 USD
View
Most Expensive
Rare Carat
P82T-34B · Oct 28
$3,435 USD
View
Price last confirmed 7 days ago
15 more retailers have this diamond
Prices start from $338 USDSave up to $2,662 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
1.45ct Marquise
$338 USD