Marquise|Lab Grown|IGI

2.78ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG851649510

Certificate IGI LG851649510

Diamond specifications and retailer prices

From $2,198 USD
As of November 1, 2026
Save $7,379 USD (77%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $9,577 USD at Riddles Jewelry · As of November 1, 2026
View at Riddles Jewelry

About this 2.78ct lab-grown marquise diamond

This 2.78ct lab-grown marquise sits in the two to three carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG851649510 or 851649510. Listed at 5 retailers as of November 1, 2026, with prices from $2,198 to $9,577, a $7,379 spread on the same certified stone. Riddles Jewelry lists it at $9,577. 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

2.78
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG851649510
Dimensions14.32 × 7.34 × 4.61 mm
L/W Ratio1.95
Top View
14.32 mm7.34 mm2.78 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG851649510
Side View
Table 61.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 62.8%

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: $3,162 USD|Low: $2,198 USD|High: $9,577 USD|Avg: $5,362 USD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Riddles Jewelry
November 1, 2026
Retailer 2$2,198 USD
Retailer 1$3,162 USD
Retailer 3$4,320 USD
Retailer 4$6,978 USD
Riddles Jewelry$9,577 USD

2 data points across 5 retailers

5 retailers$2,198 USD to $9,577 USD

A
Cheapest Retailer
-
$2,198 USD
A
Retailer 2
-
$3,162 USD
View
A
Retailer 3
-
$4,320 USD
View
B+
Retailer 4
-
$6,978 USD
A$10,736 AUD
View
Most Expensive
B
Riddles Jewelry
1998704627 · Nov 1
$9,577 USD
View
4 more retailers have this diamond
Prices start from $2,198 USDSave up to $7,379 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
2.78ct Marquise
$2,198 USD