Radiant|Lab Grown|IGI

4.78ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG831678037

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

Certificate IGI LG831678037

Diamond specifications and retailer prices

From $605 USD
As of October 27, 2026
Save $3,575 USD (86%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $4,180 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 4.78ct lab-grown radiant diamond

This 4.78ct lab-grown radiant sits in the three to five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG831678037 or 831678037. Listed at 15 retailers as of October 27, 2026, with prices from $605 to $4,180, a $3,575 spread on the same certified stone. Brilliant Earth lists it at $4,180. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.78
Carat
G
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.1°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831678037
Dimensions11.74 × 8.35 × 5.67 mm
L/W Ratio1.41
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.74 mm8.35 mm4.78 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831678037
Side View
Table 68.0%Crown 44.1°Girdle: ThickPavilion 35.6°Culet: NoneDepth 67.9%

Caratlytics Score

How it works →
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 27
Current: $4,180 USD|Low: $668 USD|High: $4,220 USD|Avg: $2,037 USD|-0.9%
Brilliant Earth
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
October 30, 2026
Retailer 14$668 USD
Retailer 2$704 USD
Retailer 7$870 USD
Retailer 13$992 USD
Retailer 3$1,137 USD
Retailer 4$1,513 USD
Retailer 6$1,625 USD
Retailer 12$1,724 USD
Retailer 9$1,946 USD
Retailer 10$2,243 USD
Retailer 5$3,105 USD
Retailer 8$3,228 USD
Retailer 11$3,263 USD
Brilliant Earth$4,180 USD

30 data points across 14 retailers

15 retailers$605 USD to $4,180 USD

A
Cheapest Retailer
-
$605 USD
A
Retailer 2
-
$668 USD
View
A
Retailer 3
-
$704 USD
View
Final sale: no returns
A
Retailer 4
-
$870 USD
View
B+
Retailer 5
-
$992 USD
View
Retailer 6
-
$1,137 USD
€1,083 EUR
View
Price last confirmed 7 days ago
Retailer 7
-
$1,513 USD
A$2,327 AUD
View
Price last confirmed 10 days ago
B+
Retailer 8
-
$1,625 USD
View
A
Retailer 9
-
$1,724 USD
View
B+
Retailer 10
-
$1,946 USD
View
B+
Retailer 11
-
$2,243 USD
View
B
Retailer 12
-
$3,105 USD
View
B+
Retailer 13
-
$3,228 USD
£2,542 GBP
View
B
Retailer 14
-
$3,263 USD
View
Most Expensive
B
Brilliant Earth
21304716A · Oct 29
$4,180 USD
View
14 more retailers have this diamond
Prices start from $605 USDSave up to $3,575 USD

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
4.78ct Radiant
$605 USD