Emerald|Lab Grown|IGI

1.78ct D IF Emerald Lab Grown Diamond

ID • D/IF • IGI LG812621755

Shape and cutting style on the report: Emerald cut

Certificate IGI LG812621755

Diamond specifications and retailer prices

From $331 USD
As of October 30, 2026
Save $2,609 USD (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,941 USD at Rare Carat · As of September 16, 2026
View at Rare Carat

About this 1.78ct lab-grown emerald diamond

This 1.78ct lab-grown emerald sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG812621755 or 812621755. Listed at 17 retailers as of October 29, 2026, with a 788% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.5°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG812621755
Dimensions8.22 × 5.73 × 3.81 mm
L/W Ratio1.43
Culet sizeLarge
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
8.22 mm5.73 mm1.78 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG812621755
Side View
Table 63.0%Crown 31.5°Girdle: MediumPavilion 40.1°Culet: LargeDepth 66.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $2,941 USD|Low: $266 USD|High: $2,941 USD|Avg: $1,091 USD
Rare Carat
Retailer 2
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Retailer 11
Retailer 12
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Retailer 19
October 29, 2026
Retailer 11$284 USD
Retailer 16$331 USD
Retailer 7$370 USD
Retailer 6$411 USD
Retailer 17$411 USD
Retailer 15$620 USD
Retailer 8$664 USD
Retailer 12$705 USD
Retailer 10$721 USD
Retailer 9$930 USD
Retailer 2$957 USD
Retailer 3$1,066 USD
Retailer 14$1,204 USD
Retailer 19$1,481 USD
Retailer 18$1,508 USD
Retailer 5$1,551 USD
Retailer 13$1,647 USD
Retailer 4$2,940 USD
Rare Carat$2,941 USD

24 data points across 19 retailers

17 retailers$331 USD to $2,940 USD

A
Cheapest Retailer
-
$331 USD
A
Retailer 2
-
$370 USD
View
Final sale: no returns
A
Retailer 3
-
$411 USD
View
A
Retailer 4
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$411 USD
View
A
Retailer 5
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$620 USD
View
A
Retailer 6
-
$664 USD
View
A
Retailer 7
-
$705 USD
ZAR 11,397 ZAR
View
Retailer 8
-
$930 USD
View
Price last confirmed 29 days ago
A
Retailer 9
-
$957 USD
A$1,472 AUD
View
A
Retailer 10
-
$1,066 USD
View
B+
Retailer 11
-
$1,204 USD
View
B+
Retailer 12
-
$1,481 USD
View
B+
Retailer 13
-
$1,508 USD
View
B+
Retailer 14
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$1,551 USD
View
B+
Retailer 15
-
$1,647 USD
£1,297 GBP
View
B
Retailer 16
-
$2,940 USD
View
Most Expensive
Rare Carat
C388-1A · Sep 16
$2,941 USD
View
Price last confirmed 44 days ago
16 more retailers have this diamond
Prices start from $331 USDSave up to $2,609 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
1.78ct Emerald
$331 USD