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Round|Lab Grown|IGI

1.78ct E SI2 Round Lab Grown Diamond

ID • E/SI2 • IGI LG787639594

Certificate IGI LG787639594

Diamond specifications and retailer prices

From $1,420 USD
As of October 28, 2026
Save $840 USD (37%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $2,260 USD at Jared · As of October 28, 2026
View at Jared

About this 1.78ct lab-grown round diamond

This 1.78ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG787639594 or 787639594. Listed at 3 retailers as of October 28, 2026, with prices from $1,420 to $2,260, a $840 spread on the same certified stone. Jared lists it at $2,260. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.78
Carat
E
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG787639594
Dimensions7.77 × 7.82 mm
L/W Ratio1.01
Top View
7.77 mm7.82 mm1.78 ctE / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG787639594
Side View
Table 60.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 60.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 28
Current: $2,260 USD|Low: $1,420 USD|High: $2,260 USD|Avg: $1,773 USD
Jared
Retailer 2
Retailer 3
July 10, 2026
Retailer 2$1,420 USD
Retailer 3$1,420 USD
Jared$2,260 USD

5 data points across 3 retailers

3 retailers$1,420 USD to $2,260 USD

B
Cheapest Retailer
-
$1,420 USD
B
Retailer 2
-
$1,420 USD
View
Most Expensive
B
Jared
158584786 · Oct 28
$2,260 USD
View
2 more retailers have this diamond
Prices start from $1,420 USDSave up to $840 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.

B
1.78ct Round
$1,420 USD