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Radiant|Lab Grown|IGI

1.78ct G SI1 Radiant Lab Grown Diamond

VG • G/SI1 • IGI LG583323997

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG583323997

Diamond specifications and retailer prices

From $1,103 USD
As of October 23, 2026
13 retailers carry this diamond
Most expensive: $4,131 USD at MOH London · As of October 21, 2026
View at MOH London

About this 1.78ct lab-grown radiant diamond

This 1.78ct lab-grown radiant sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG583323997 or 583323997. Listed at 13 retailers as of October 21, 2026. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.78
Carat
G
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG583323997
Dimensions8.49 × 5.98 × 4.08 mm
L/W Ratio1.42
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
8.49 mm5.98 mm1.78 ctG / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG583323997
Side View
Table 66.0%Crown 45°Girdle: MediumPavilion 34.9°Culet: NoneDepth 68.2%

Caratlytics Score

No score right now
No retailer has confirmed this stone recently, so we are not scoring it. Prices below are as of the date shown.

Price History

Last verified: Oct 23
Current: $4,131 USD|Low: $1,266 USD|High: $4,159 USD|Avg: $2,191 USD|-0.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 24, 2026
Retailer 3$1,266 USD
Retailer 6$1,279 USD
Retailer 5$1,455 USD
Retailer 2$1,752 USD
Retailer 4$1,893 USD
Retailer 10$1,919 USD
Retailer 8$2,035 USD
Retailer 7$2,594 USD
Retailer 9$2,598 USD
Retailer 11$3,663 USD
MOH London$4,131 USD

16 data points across 11 retailers

13 retailers$1,103 USD to $4,131 USD

Retailer 1
-
$1,103 USD
Price last confirmed 7 days ago
Retailer 2
-
$1,103 USD
View
Price last confirmed 9 days ago
Retailer 3
-
$1,103 USD
View
Price last confirmed 23 days ago
Retailer 4
-
$1,279 USD
View
Price last confirmed 18 days ago
Retailer 5
-
$1,279 USD
View
Price last confirmed 23 days ago
Retailer 6
-
$1,455 USD
View
Price last confirmed 7 days ago
Retailer 7
-
$1,752 USD
£1,379 GBP
View
Price last confirmed 7 days ago
Retailer 8
-
$1,893 USD
£1,490 GBP
View
Price last confirmed 7 days ago
Retailer 9
-
$2,035 USD
View
Price last confirmed 8 days ago
Retailer 10
-
$2,397 USD
View
Price last confirmed 23 days ago
Retailer 11
-
$2,397 USD
View
Price last confirmed 14 days ago
Retailer 12
-
$2,594 USD
View
Price last confirmed 8 days ago
Most Expensive
MOH London
LG583323997 · Oct 21
$4,131 USD
£3,253 GBP
View
Price under review
12 more retailers have this diamond

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.

1.78ct Radiant
$1,103 USD