Asscher|Lab Grown|IGI

1.78ct F SI2 Asscher Lab Grown Diamond

ID • F/SI2 • IGI LG620447925

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG620447925

Diamond specifications and retailer prices

From $387 NZD
$218 USD
As of October 27, 2026
Save $1,498 NZD (79%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $2,129 NZD at MOH London · As of October 21, 2026
View at MOH London

About this 1.78ct lab-grown asscher diamond

This 1.78ct lab-grown asscher sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG620447925 or 620447925. Listed at 9 retailers as of October 27, 2026, with a 387% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle42.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620447925
Dimensions6.70 × 6.63 × 4.33 mm
L/W Ratio1.01
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.70 mm6.63 mm1.78 ctF / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620447925
Side View
Table 65.0%Crown 33.2°Girdle: MediumPavilion 42.3°Culet: NoneDepth 65.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $2,129 NZD|Low: $387 NZD|High: $2,260 NZD|Avg: $1,281 NZD|-5.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 27, 2026
Retailer 4$387 NZD
Retailer 2$449 NZD
Retailer 5$679 NZD
Retailer 3$734 NZD
Retailer 9$820 NZD
Retailer 11$956 NZD
Retailer 10$1,434 NZD
Retailer 6$1,545 NZD
Retailer 7$1,700 NZD
Retailer 8$2,129 NZD
MOH London$2,129 NZD

33 data points across 11 retailers

9 retailers$387 NZD to $1,885 NZD

A
Cheapest Retailer
-
$387 NZD
$218 USD
A
Retailer 2
-
$449 NZD
$253 USD
View
A
Retailer 3
-
$679 NZD
£301 GBP
View
Retailer 4
-
$820 NZD
$462 USD
View
Price last confirmed 7 days ago
B+
Retailer 5
-
$1,545 NZD
$871 USD
View
Retailer 6
-
$1,700 NZD
$958 USD
View
Price last confirmed 7 days ago
B+
Retailer 7
-
$1,885 NZD
£837 GBP
View
Retailer 8
-
$2,129 NZD
$1,200 USD
View
Price last confirmed 7 days ago
Most Expensive
MOH London
LG620447925 · Oct 21
$2,129 NZD
£945 GBP
View
Price last confirmed 11 days ago
8 more retailers have this diamond
Prices start from $387 NZDSave up to $1,498 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 Asscher
$387 NZD