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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 £247 GBP
$331 USD
As of October 30, 2026
Save £1,947 GBP (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £2,195 GBP 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: £2,195 GBP|Low: £199 GBP|High: £2,195 GBP|Avg: £814 GBP
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
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Retailer 19
October 29, 2026
Retailer 11£212 GBP
Retailer 16£247 GBP
Retailer 7£276 GBP
Retailer 6£307 GBP
Retailer 17£307 GBP
Retailer 15£463 GBP
Retailer 8£496 GBP
Retailer 12£527 GBP
Retailer 10£538 GBP
Retailer 9£694 GBP
Retailer 2£714 GBP
Retailer 3£796 GBP
Retailer 14£899 GBP
Retailer 19£1,105 GBP
Retailer 18£1,126 GBP
Retailer 5£1,158 GBP
Retailer 13£1,229 GBP
Retailer 4£2,194 GBP
Rare Carat£2,195 GBP

23 data points across 19 retailers

17 retailers£247 GBP to £2,194 GBP

A
Cheapest Retailer
-
£247 GBP
$331 USD
A
Retailer 2
-
£276 GBP
$370 USD
View
Final sale: no returns
A
Retailer 3
-
£307 GBP
$411 USD
View
A
Retailer 4
-
£307 GBP
$411 USD
View
A
Retailer 5
-
£463 GBP
$620 USD
View
A
Retailer 6
-
£496 GBP
$664 USD
View
A
Retailer 7
-
£527 GBP
ZAR 11,397 ZAR
View
Retailer 8
-
£694 GBP
$930 USD
View
Price last confirmed 30 days ago
A
Retailer 9
-
£714 GBP
A$1,472 AUD
View
A
Retailer 10
-
£796 GBP
$1,066 USD
View
B+
Retailer 11
-
£899 GBP
$1,204 USD
View
B+
Retailer 12
-
£1,105 GBP
$1,481 USD
View
B+
Retailer 13
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£1,126 GBP
$1,508 USD
View
B+
Retailer 14
-
£1,158 GBP
$1,551 USD
View
B+
Retailer 15
-
£1,229 GBP
View
B
Retailer 16
-
£2,194 GBP
$2,940 USD
View
Most Expensive
Rare Carat
C388-1A · Sep 16
£2,195 GBP
$2,941 USD
View
Price last confirmed 45 days ago
16 more retailers have this diamond
Prices start from £247 GBPSave up to £1,947 GBP

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
£247 GBP