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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 $471 AUD
$331 USD
As of October 30, 2026
Save $3,714 AUD (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $4,187 AUD 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
Colour
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

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: Oct 30
Current: $4,187 AUD|Low: $379 AUD|High: $4,187 AUD|Avg: $1,553 AUD
Rare Carat
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 29, 2026
Retailer 11$404 AUD
Retailer 16$471 AUD
Retailer 7$527 AUD
Retailer 6$585 AUD
Retailer 17$585 AUD
Retailer 15$883 AUD
Retailer 8$945 AUD
Retailer 12$1,004 AUD
Retailer 10$1,027 AUD
Retailer 9$1,324 AUD
Retailer 2$1,362 AUD
Retailer 3$1,518 AUD
Retailer 14$1,714 AUD
Retailer 19$2,108 AUD
Retailer 18$2,147 AUD
Retailer 5$2,208 AUD
Retailer 13$2,345 AUD
Retailer 4$4,185 AUD
Rare Carat$4,187 AUD

24 data points across 19 retailers

17 retailers$471 AUD to $4,185 AUD

A
Cheapest Retailer
-
$471 AUD
$331 USD
A
Retailer 2
-
$527 AUD
$370 USD
View
Final sale: no returns
A
Retailer 3
-
$585 AUD
$411 USD
View
A
Retailer 4
-
$585 AUD
$411 USD
View
A
Retailer 5
-
$883 AUD
$620 USD
View
A
Retailer 6
-
$945 AUD
$664 USD
View
A
Retailer 7
-
$1,004 AUD
ZAR 11,397 ZAR
View
Retailer 8
-
$1,324 AUD
$930 USD
View
Price last confirmed 29 days ago
A
Retailer 9
-
$1,362 AUD
View
A
Retailer 10
-
$1,518 AUD
$1,066 USD
View
B+
Retailer 11
-
$1,714 AUD
$1,204 USD
View
B+
Retailer 12
-
$2,108 AUD
$1,481 USD
View
B+
Retailer 13
-
$2,147 AUD
$1,508 USD
View
B+
Retailer 14
-
$2,208 AUD
$1,551 USD
View
B+
Retailer 15
-
$2,345 AUD
£1,297 GBP
View
B
Retailer 16
-
$4,185 AUD
$2,940 USD
View
Most Expensive
Rare Carat
C388-1A · Sep 16
$4,187 AUD
$2,941 USD
View
Price last confirmed 44 days ago
16 more retailers have this diamond
Prices start from $471 AUDSave up to $3,714 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
1.78ct Emerald
$471 AUD