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Round|Lab Grown|IGI

3.78ct D VS1 Round Lab Grown Diamond

ID • D/VS1 • IGI LG828624505

Shape and cutting style on the report: Round brilliant

Certificate IGI LG828624505

Diamond specifications and retailer prices

From $610 USD
As of October 29, 2026
Save $4,780 USD (89%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $5,390 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.78ct lab-grown round diamond

This 3.78ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG828624505 or 828624505. Listed at 14 retailers as of October 29, 2026, with prices from $610 to $5,390, a $4,780 spread on the same certified stone. Brilliant Earth lists it at $5,390. 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

3.78
Carat
D
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG828624505
Dimensions9.95 × 9.90 × 6.15 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.95 mm9.90 mm3.78 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG828624505
Side View
Table 56.0%Crown 34°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 61.9%

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: $5,390 USD|Low: $607 USD|High: $5,560 USD|Avg: $2,457 USD|-3.1%
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
October 29, 2026
Retailer 10$610 USD
Retailer 8$683 USD
Retailer 13$973 USD
Retailer 2$1,152 USD
Retailer 7$1,607 USD
Retailer 9$1,877 USD
Retailer 6$1,880 USD
Retailer 11$1,989 USD
Retailer 3$2,297 USD
Retailer 5$3,001 USD
Retailer 12$3,302 USD
Retailer 4$3,480 USD
Brilliant Earth$5,390 USD

27 data points across 13 retailers

14 retailers$610 USD to $5,390 USD

A
Cheapest Retailer
-
$610 USD
A
Retailer 2
-
$683 USD
View
Retailer 3
-
$973 USD
£766 GBP
View
Price last confirmed 13 days ago
A
Retailer 4
-
$1,152 USD
€1,097 EUR
View
Retailer 5
-
$1,607 USD
A$2,473 AUD
View
Price last confirmed 9 days ago
B+
Retailer 6
-
$1,877 USD
View
B+
Retailer 7
-
$1,880 USD
View
B+
Retailer 8
-
$1,989 USD
View
B+
Retailer 9
-
$2,297 USD
View
B
Retailer 10
-
$2,795 USD
View
Retailer 11
-
$3,001 USD
SGD 4,055 SGD
View
Price last confirmed 17 days ago
Retailer 12
-
$3,302 USD
£2,600 GBP
View
Price last confirmed 8 days ago
B
Retailer 13
-
$3,480 USD
View
Most Expensive
B
Brilliant Earth
21004857A · Oct 29
$5,390 USD
View
13 more retailers have this diamond
Prices start from $610 USDSave up to $4,780 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
3.78ct Round
$610 USD