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Marquise|Lab Grown|IGI

2.55ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG780664158

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780664158

Diamond specifications and retailer prices

From $4,862 AUD
$3,415 USD
As of November 2, 2026
Save $16,369 AUD (77%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $21,230 AUD at With Clarity · As of November 2, 2026
View at With Clarity

About this 2.55ct lab-grown marquise diamond

This 2.55ct lab-grown marquise sits in the two to three carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780664158 or 780664158. Listed at 16 retailers as of November 2, 2026, with prices from $4,862 to $21,230, a $16,369 spread on the same certified stone. With Clarity lists it at $21,230. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

2.55
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780664158
Dimensions13.79 × 7.10 × 4.49 mm
L/W Ratio1.94
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
13.79 mm7.10 mm2.55 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780664158
Side View
Table 59.0%Crown 36.9°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 63.2%

Caratlytics Score

How it works →
A
Excellent
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: Nov 2
Current: $4,914 AUD|Low: $3,561 AUD|High: $26,862 AUD|Avg: $11,060 AUD|+10.6%
Retailer 1
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
With Clarity
November 2, 2026
Retailer 6$3,561 AUD
Retailer 3$4,862 AUD
Retailer 1$4,914 AUD
Retailer 9$6,706 AUD
Retailer 12$6,812 AUD
Retailer 8$7,233 AUD
Retailer 5$8,240 AUD
Retailer 2$8,768 AUD
Retailer 10$9,624 AUD
Retailer 14$13,585 AUD
Retailer 11$13,768 AUD
Retailer 15$14,011 AUD
Retailer 4$14,376 AUD
Retailer 13$15,482 AUD
Retailer 7$19,026 AUD
With Clarity$21,230 AUD

26 data points across 16 retailers

16 retailers$4,862 AUD to $21,230 AUD

A
Cheapest Retailer
-
$4,862 AUD
$3,415 USD
A
Retailer 2
-
$4,914 AUD
$3,452 USD
View
B+
Retailer 3
-
$6,706 AUD
HK$36,800 HKD
View
B+
Retailer 4
-
$6,812 AUD
$4,785 USD
View
B+
Retailer 5
-
$7,233 AUD
£4,001 GBP
View
B+
Retailer 6
-
$8,240 AUD
$5,788 USD
View
B+
Retailer 7
-
$8,768 AUD
€5,866 EUR
View
B+
Retailer 8
-
$9,325 AUD
$6,550 USD
View
B
Retailer 9
-
$9,624 AUD
$6,760 USD
View
B
Retailer 10
-
$13,585 AUD
$9,543 USD
View
B
Retailer 11
-
$13,768 AUD
£7,615 GBP
View
B
Retailer 12
-
$14,011 AUD
ZAR 158,992 ZAR
View
Retailer 13
-
$14,376 AUD
$10,098 USD
View
Price last confirmed 9 days ago
B
Retailer 14
-
$15,482 AUD
View
B
Retailer 15
-
$19,026 AUD
$13,364 USD
View
Most Expensive
B
With Clarity
780664158 · Nov 2
$21,230 AUD
$14,913 USD
View
15 more retailers have this diamond
Prices start from $4,862 AUDSave up to $16,369 AUD

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
2.55ct Marquise
$4,862 AUD