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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 $587 NZD
$331 USD
As of October 30, 2026
Save $4,629 NZD (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $5,218 NZD 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 30, 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

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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: $5,218 NZD|Low: $472 NZD|High: $5,218 NZD|Avg: $1,936 NZD
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$503 NZD
Retailer 16$587 NZD
Retailer 7$656 NZD
Retailer 6$729 NZD
Retailer 17$729 NZD
Retailer 15$1,100 NZD
Retailer 8$1,178 NZD
Retailer 12$1,252 NZD
Retailer 10$1,279 NZD
Retailer 9$1,650 NZD
Retailer 2$1,698 NZD
Retailer 3$1,891 NZD
Retailer 14$2,136 NZD
Retailer 19$2,627 NZD
Retailer 18$2,676 NZD
Retailer 5$2,752 NZD
Retailer 13$2,923 NZD
Retailer 4$5,216 NZD
Rare Carat$5,218 NZD

23 data points across 19 retailers

17 retailers$587 NZD to $5,216 NZD

A
Cheapest Retailer
-
$587 NZD
$331 USD
A
Retailer 2
-
$656 NZD
$370 USD
View
Final sale: no returns
A
Retailer 3
-
$729 NZD
$411 USD
View
A
Retailer 4
-
$729 NZD
$411 USD
View
A
Retailer 5
-
$1,100 NZD
$620 USD
View
A
Retailer 6
-
$1,178 NZD
$664 USD
View
A
Retailer 7
-
$1,252 NZD
ZAR 11,397 ZAR
View
Retailer 8
-
$1,650 NZD
$930 USD
View
Price last confirmed 30 days ago
A
Retailer 9
-
$1,698 NZD
A$1,472 AUD
View
A
Retailer 10
-
$1,891 NZD
$1,066 USD
View
B+
Retailer 11
-
$2,136 NZD
$1,204 USD
View
B+
Retailer 12
-
$2,627 NZD
$1,481 USD
View
B+
Retailer 13
-
$2,676 NZD
$1,508 USD
View
B+
Retailer 14
-
$2,752 NZD
$1,551 USD
View
B+
Retailer 15
-
$2,923 NZD
£1,297 GBP
View
B
Retailer 16
-
$5,216 NZD
$2,940 USD
View
Most Expensive
Rare Carat
C388-1A · Sep 16
$5,218 NZD
$2,941 USD
View
Price last confirmed 45 days ago
16 more retailers have this diamond
Prices start from $587 NZDSave up to $4,629 NZD

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
$587 NZD