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Marquise|Lab Grown|IGI

1.55ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG780685588

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780685588

Diamond specifications and retailer prices

From $1,151 USD
As of November 4, 2026
Save $3,829 USD (77%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $4,980 USD at Brilliant Earth · As of November 3, 2026
View at Brilliant Earth

About this 1.55ct lab-grown marquise diamond

This 1.55ct lab-grown marquise 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 LG780685588 or 780685588. Listed at 25 retailers as of November 3, 2026, with prices from $1,151 to $4,980, a $3,829 spread on the same certified stone. Brilliant Earth lists it at $4,980. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780685588
Dimensions11.67 × 6.08 × 3.87 mm
L/W Ratio1.92
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
11.67 mm6.08 mm1.55 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780685588
Side View
Table 60.0%Crown 35.6°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 63.7%

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: $4,980 USD|Low: $987 USD|High: $4,980 USD|Avg: $2,420 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 5, 2026
Retailer 11$1,028 USD
Retailer 4$1,192 USD
Retailer 5$1,344 USD
Retailer 9$1,365 USD
Retailer 2$1,702 USD
Retailer 12$1,705 USD
Retailer 7$2,193 USD
Retailer 8$2,300 USD
Retailer 10$3,230 USD
Retailer 3$3,520 USD
Retailer 6$4,043 USD
Brilliant Earth$4,980 USD

35 data points across 12 retailers

25 retailers$1,151 USD to $4,980 USD

Retailer 1
-
$1,028 USD
Price last confirmed 28 days ago
Retailer 2
-
$1,118 USD
View
Price last confirmed 21 days ago
A
Retailer 3
-
$1,151 USD
View
Final sale: no returns
Retailer 4
-
$1,192 USD
View
Price last confirmed 33 days ago
Retailer 5
-
$1,192 USD
View
Price last confirmed 24 days ago
A
Retailer 6
-
$1,305 USD
View
A
Retailer 7
-
$1,344 USD
View
A
Retailer 8
-
$1,365 USD
View
A
Retailer 9
-
$1,395 USD
View
A
Retailer 10
-
$1,702 USD
View
A
Retailer 11
-
$1,705 USD
View
B+
Retailer 12
-
$2,193 USD
View
Retailer 13
-
$2,235 USD
View
Price last confirmed 36 days ago
B+
Retailer 14
-
$2,300 USD
View
B+
Retailer 15
-
$2,492 USD
View
Retailer 16
-
$3,230 USD
View
Price last confirmed 7 days ago
B
Retailer 17
-
$3,291 USD
View
B
Retailer 18
-
$3,520 USD
View
B
Retailer 19
-
$3,696 USD
View
B
Retailer 20
-
$3,835 USD
View
B
Retailer 21
-
$3,995 USD
View
B
Retailer 22
-
$4,043 USD
View
B
Retailer 23
-
$4,159 USD
View
B
Retailer 24
-
$4,980 USD
View
Most Expensive
B
Brilliant Earth
19705255A · Nov 3
$4,980 USD
View
24 more retailers have this diamond
Prices start from $1,151 USDSave up to $3,829 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
1.55ct Marquise
$1,151 USD