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1.78ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG629482184

Shape and cutting style on the report: Round brilliant

Certificate IGI LG629482184

Diamond specifications and retailer prices

From $374 NZD
$210 USD
As of October 29, 2026
Save $3,650 NZD (91%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,024 NZD at Jared · As of October 28, 2026
View at Jared

About this 1.78ct lab-grown round diamond

This 1.78ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG629482184 or 629482184. Listed at 10 retailers as of October 28, 2026, with prices from $374 to $4,024, a $3,650 spread on the same certified stone. Jared lists it at $4,024. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG629482184
Dimensions7.78 × 7.82 × 4.76 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.78 mm7.82 mm1.78 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG629482184
Side View
Table 58.0%Crown 33.7°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.1%

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 29
Current: $2,067 NZD|Low: $313 NZD|High: $3,721 NZD|Avg: $1,500 NZD|-2.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 29, 2026
Retailer 11$374 NZD
Retailer 12$424 NZD
Retailer 10$434 NZD
Retailer 9$798 NZD
Retailer 2$1,001 NZD
Retailer 3$1,097 NZD
Retailer 13$1,186 NZD
Retailer 6$1,499 NZD
Retailer 7$1,649 NZD
Retailer 5$1,763 NZD
Retailer 1$2,067 NZD
Retailer 4$2,671 NZD
Retailer 8$3,597 NZD

17 data points across 13 retailers

10 retailers$374 NZD to $4,024 NZD

A
Cheapest Retailer
-
$374 NZD
$210 USD
A
Retailer 2
-
$424 NZD
$238 USD
View
Final sale: no returns
A
Retailer 3
-
$434 NZD
$244 USD
View
B+
Retailer 4
-
$798 NZD
$448 USD
View
B+
Retailer 5
-
$1,499 NZD
$842 USD
View
B+
Retailer 6
-
$1,649 NZD
$926 USD
View
B
Retailer 7
-
$2,067 NZD
£914 GBP
View
B
Retailer 8
-
$2,671 NZD
$1,500 USD
View
B
Retailer 9
-
$3,597 NZD
$2,020 USD
View
Most Expensive
B
Jared
150918409 · Oct 28
$4,024 NZD
$2,260 USD
View
9 more retailers have this diamond
Prices start from $374 NZDSave up to $3,650 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 Round
$374 NZD