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Marquise|Lab Grown|IGI

1.28ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG780662708

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780662708

Diamond specifications and retailer prices

From $768 USD
HK$6,000 HKD
As of November 1, 2026
Save $2,662 USD (78%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $3,430 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.28ct lab-grown marquise diamond

This 1.28ct 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 LG780662708 or 780662708. Listed at 14 retailers as of October 31, 2026, with prices from $768 to $3,430, a $2,662 spread on the same certified stone. Brilliant Earth lists it at $3,430. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780662708
Dimensions11.19 × 5.69 × 3.58 mm
L/W Ratio1.97
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
11.19 mm5.69 mm1.28 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780662708
Side View
Table 61.0%Crown 35°Girdle: MED-THKPavilion 41°Culet: NoneDepth 62.9%

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 1
Current: $3,430 USD|Low: $768 USD|High: $3,430 USD|Avg: $1,649 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
Retailer 13
Retailer 14
November 1, 2026
Retailer 4$768 USD
Retailer 11$878 USD
Retailer 3$945 USD
Retailer 14$948 USD
Retailer 7$1,028 USD
Retailer 2$1,043 USD
Retailer 9$1,151 USD
Retailer 10$1,188 USD
Retailer 13$1,577 USD
Retailer 12$2,174 USD
Retailer 6$2,560 USD
Retailer 5$2,645 USD
Retailer 8$2,811 USD
Brilliant Earth$3,430 USD

40 data points across 14 retailers

14 retailers$768 USD to $3,430 USD

A
Cheapest Retailer
-
$768 USD
HK$6,000 HKD
A
Retailer 2
-
$878 USD
View
A
Retailer 3
-
$945 USD
View
A
Retailer 4
-
$948 USD
View
A
Retailer 5
-
$1,028 USD
€979 EUR
View
A
Retailer 6
-
$1,043 USD
£821 GBP
View
B+
Retailer 7
-
$1,151 USD
ZAR 18,595 ZAR
View
B+
Retailer 8
-
$1,188 USD
A$1,828 AUD
View
Retailer 9
-
$1,577 USD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
$2,174 USD
View
Retailer 11
-
$2,560 USD
View
Price last confirmed 26 days ago
B
Retailer 12
-
$2,645 USD
View
B
Retailer 13
-
$2,811 USD
£2,213 GBP
View
Most Expensive
B
Brilliant Earth
18951473A · Oct 31
$3,430 USD
View
13 more retailers have this diamond
Prices start from $768 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
1.28ct Marquise
$768 USD